| 開く | ひらく | to open; to undo; to unseal; to unpack | n4 |
| 開発 | かいはつ | development; cultivation; application; exploitation (of resources) | n2 |
| 開催 | かいさい | holding (a conference, exhibition, etc.); opening; hosting (e.g. the Olympics) | n2 |
| 公開 | こうかい | opening to the public; making available to the public; exhibiting; unveiling | n2 |
| 開ける | あける | to open (a door, etc.); to unwrap (e.g. parcel, package); to unlock; to open (for business, etc.) | n5 |
| 開始 | かいし | start; commencement; beginning; initiation | n3 |
| 展開 | てんかい | development; evolution; progression; unfolding | n2 |
| 開業 | かいぎょう | opening a business; opening a practice | n1 |
| 開 | かい | open; beginning | n2 |
| 開設 | かいせつ | establishment; opening; setting up; inauguration | n2 |
| 開拓 | かいたく | reclamation (e.g. of wasteland); cultivation; development; pioneering | n1 |
| 公開日 | こうかいひ | release date; publication date; opening day; open day | |
| 開放 | かいほう | opening (a door, window, etc.); leaving open; opening up (e.g. to the public); allowing (public) access | n2 |
| 見開く | みひらく | to open (one's eyes) wide | n1 |
| 開花 | かいか | flowering; blooming; blossoming; coming into bloom | n2 |
| 再開 | さいかい | reopening; resumption; restarting | n2 |
| 開け放す | あけはなす | to open wide (doors or windows); to throw open; to fling open; to leave open | |
| 開き | ひらき | opening; gap; dried and opened fish; extension | |
| 開催中 | かいさいちゅう | in session; in progress; under way; open | |
| 未開 | みかい | uncivilized; uncivilised; primitive; savage | |
| 開閉 | かいへい | opening and shutting; opening and closing | n3 |
| 開幕 | かいまく | raising the curtain; opening (of an event); start; beginning | n2 |
| 疎開 | そかい | evacuation (to the country); spreading out (troops); deployment; dispersal | |
| 開通 | かいつう | opening (of a new road, railway, etc.); going into operation (e.g. telephone communication); beginning services; reopening (e.g. of a road to traffic) | |
| 切り開く | きりひらく | to cut open; to clear (land); to cut (a path, road, etc.); to open | n1 |
| 開示 | かいじ | release (of information, documents, etc.); disclosure; display; discovery | |
| 開封 | かいふう | opening (a letter, parcel, etc.); breaking the seal; unboxing (a product); unsealed mail | n2 |
| 開祖 | かいそ | (sect) founder; apostle; originator; inventor | |
| 満開 | まんかい | full bloom (esp. of cherry blossom); full blossom | n1 |
| 開運 | かいうん | better fortune | |
| 開化 | かいか | civilization; civilisation; enlightenment | n2 |
| 開墾 | かいこん | cultivating new land; clearing; reclamation | |
| 打開 | だかい | break in the deadlock | n1 |
| 開店 | かいてん | opening a new shop; opening a shop (for the day) | n3 |
| 非公開 | ひこうかい | private; non-public; secret; closed-door | |
| 再開発 | さいかいはつ | redevelopment | |
| 開催日 | かいさいび | date (of an event, meeting, etc.) | |
| 開戦 | かいせん | outbreak of war; starting a war | n1 |
| 開き直る | ひらきなおる | to become defiant; to fight back; to turn upon; to take the offensive | |
| 押し開く | おしひらく | to push open | |
| 開国 | かいこく | founding a country; opening of a country (e.g. Japan) to the world; ending (a policy of) national seclusion | |
| 開港 | かいこう | opening a port (seaport, airport, etc.); starting operations at a port; opening a port to foreign vessels or trade | n1 |
| 開発者 | かいはつしゃ | developer | |
| 切開 | せっかい | incision; operation; section | |
| 開場 | かいじょう | opening (the doors of a venue); inauguration (of a new building, facility, etc.) | n3 |
| 川開き | かわびらき | festival marking the start of boating season | |
| 文明開化 | ぶんめいかいか | civilization and enlightenment; Japan's Westernization movement during the Meiji era (Westernisation) | |
| 開け放つ | あけはなつ | to open wide (doors or windows); to throw open; to fling open; to leave open | |
| 開演 | かいえん | curtain raising; starting (e.g. play, concert) | n1 |
| 開闢 | かいびゃく | beginning of the world; creation | |
| 開会 | かいかい | opening of a meeting | n3 |
| 開館 | かいかん | opening (for that day's business; of a library, museum, cinema, etc.); opening (of a new library, museum, cinema, etc.) | n3 |
| 公開鍵 | こうかいかぎ | public key | |
| 開山 | かいさん | founding a temple (on a hill-top) | n2 |
| 新開 | しんかい | opening (of uncultivated land) | |
| 開始日 | かいしび | start date | |
| 開講 | かいこう | start of a course; start of lectures; opening of a new course; offering a course (for the first time) | n1 |
| 開帳 | かいちょう | public exhibition (of a Buddhist image); displaying (a Buddhist image); revealing (something that is supposed to remain hidden); opening (a gambling house) | n2 |
| 新開地 | しんかいち | newly-opened land; recently-settled region; frontier; new residential area | |
| 半開き | はんびらき | partly open; in half bloom | |
| 研究開発 | けんきゅうかいはつ | research and development; R&D | |
| 開鑿 | かいさく | excavation; cutting; digging | |
| 公開中 | こうかいちゅう | now available (e.g. for sale); now showing (e.g. film, exhibition) | |
| 開発元 | かいはつもと | developer (of software, video games, etc.) | |
| 開府 | かいふ | establishment of the shogunate; founding a shogunate | |
| 開口 | かいこう | opening; aperture (e.g. camera); opening one's mouth; beginning to speak | n1 |
| 開校 | かいこう | opening a school | n1 |
| こじ開ける | こじあける | to wrench open; to break open; to pry open; to prise open | |
| 開眼 | かいがん | enlightenment; spiritual awakening; opening one's eyes to the truth; reaching one's peak (as a performer, etc.) | n4 |
| 開業医 | かいぎょうい | private clinician; physician in private practice | |
| 半開 | はんかい | half-open; partly open; semicivilized; semicivilised | |
| 開局 | かいきょく | opening (of a broadcasting station, post office, bureau, etc.); establishment | |
| 開放的 | かいほうてき | open (attitude, etc.); openhearted; frank; liberal | |
| 開放感 | かいほうかん | sense of liberation; feeling of freedom | |
| お開き | おひらき | breakup (of a ceremony, wedding, party, meeting, etc.); closure | |
| 花開く | はなひらく | to blossom; to flower; to bloom; to flower (of a civilization, talent, etc.) | |
| 開けっ放し | あけっぱなし | leaving open; leaving ajar; outspoken; frank | |
| 初公開 | はつこうかい | debut; opening; first public exhibition | |
| 開催国 | かいさいこく | host country (e.g. for a conference) | |
| 開門 | かいもん | opening gate | |
| 公開練習 | こうかいれんしゅう | public workout | |
| 開陳 | かいちん | stating (one's views); expressing | |
| 公開講座 | こうかいこうざ | extension lectures | |
| 開園 | かいえん | opening of a park (theme park, botanical garden etc.) | n1 |
| 開口部 | かいこうぶ | aperture | |
| 開催地 | かいさいち | place where a meeting (conference, etc.) is held; venue | |
| 開基 | かいき | founding (of a temple or sect); founder; laying the foundation (for something); base (topology) | |
| 全開 | ぜんかい | opening fully; full throttle; full power | n3 |
| 能力開発 | のうりょくかいはつ | development of potential ability; capacity development | |
| 開き戸 | ひらきど | (hinged) door | |
| 開明 | かいめい | civilization; civilisation; enlightenment | n1 |
| 切開く | きりひらく | to cut open; to clear (land); to cut (a path, road, etc.); to open | n1 |
| 開襟 | かいきん | unbuttoning a collar; opening up (one's heart); open-necked shirt | n1 |
| システム開発 | システムかいはつ | system development | |
| 散開 | さんかい | deployment; spreading out; dispersal | |
| 情報公開 | じょうほうこうかい | freedom of information; access to information; disclosure of information (e.g. by the government); releasing information (of an organization or an individual) | n1 |
| 開城 | かいじょう | surrender of a castle; surrender of a fortress; capitulation of a stronghold | n4 |
| 帝王切開 | ていおうせっかい | Caesarean section; Cesarean section; C-section | |
| 申開き | もうしひらき | excuse; explanation; justification; defense | |
| 観音開き | かんのんびらき | double doors (opening from the centre); double-opening from the centre (of doors, casement windows, etc.); filleting fish, chicken, etc. with a central cut and peeling back the flesh | |
| 開院 | かいいん | opening a new hospital, institution, temple, etc.; opening a hospital, institution, temple, etc. (for the day); opening of (a session of) the Imperial Diet | n3 |
| 幕開け | まくあけ | rise of the curtain; opening of a play; beginning (e.g. of an era); start | |
| 開幕戦 | かいまくせん | opening game; (season) opener | |
| 宇宙開発 | うちゅうかいはつ | space development; space exploration | |
| 開票 | かいひょう | counting ballots; tally (of votes) | |
| 開花期 | かいかき | anthesis; flowering season | |
| 天地開闢 | てんちかいびゃく | creation of heaven and earth | |
| 放送開始 | ほうそうかいし | start of broadcast; commencement of transmission; sign-on | |
| 鏡開き | かがみびらき | cutting the New Year's rice cake (January 11th); traditional breaking of a sake cask at weddings, receptions, etc. | |
| 商品開発 | しょうひんかいはつ | product development | |
| 開巻 | かいかん | opening a book; opening (part) of a book | n1 |
| 未開封 | みかいふう | unopened; with an unbroken seal | |
| 開けっぱなし | あけっぱなし | leaving open; leaving ajar; outspoken; frank | |
| 共同開発 | きょうどうかいはつ | joint development | |
| 開口一番 | かいこういちばん | at the very beginning of one's speech; immediately upon opening one's mouth (to speak); before anything else; first of all | |
| 開会式 | かいかいしき | opening ceremony | |
| 職業能力開発大学校 | しょくぎょうのうりょくかいはつだいがっこう | polytechnic college (with two-year and four-year courses) | |
| 開発中 | かいはつちゅう | under development; in development | |
| 開削 | かいさく | excavation; cutting; digging | |
| 開設者 | かいせつしゃ | founder; establisher | |
| 開廷 | かいてい | court session; trial | n1 |
| 人材開発 | じんざいかいはつ | human resources development; personnel development; career development; HRD | |
| 幕開き | まくあき | rise of the curtain; opening of a play; beginning (e.g. of an era); start | |
| 開傘 | かいさん | opening of a parachute | n2 |
| 裂開 | れっかい | dehiscence; cleavage; fission | |
| 未公開 | みこうかい | unpublished; not made public; unlisted (e.g. stock); unreleased | |
| 情報開示 | じょうほうかいじ | information discovery; disclosure of information | |
| 序開き | じょびらき | beginnings; origins | |
| 両開き | りょうびらき | double (two-leaf) door | |
| 投開票 | とうかいひょう | casting and counting votes | |
| 技術開発 | ぎじゅつかいはつ | technological development | |
| 国立研究開発法人 | こくりつけんきゅうかいはつほうじん | national research and development agency | |
| 開豁 | かいかつ | open; openminded | |
| 不開示 | ふかいじ | non-disclosure (of information) | |
| 開港場 | かいこうじょう | open port; treaty port | |
| 一般公開 | いっぱんこうかい | opening to the public (e.g. garden, etc.); read permission: anybody | |
| 海外展開 | かいがいてんかい | overseas deployment (e.g. military forces); overseas expansion (e.g. business operations) | |
| 言い開き | いいひらき | excuse; explanation; justification; vindication | |
| 開け閉て | あけたて | opening and shutting; opening and closing | |
| 見開き | みひらき | (two-page) spread; two pages opposite each other | |
| 店開き | みせびらき | starting a business; opening a store (for the day) | |
| 開拓者 | かいたくしゃ | pioneer; settler; colonist | |
| 開所 | かいしょ | opening (of a new office, facility, etc.) | |
| 山開き | やまびらき | start of the mountain-climbing season | |
| 開拓使 | かいたくし | early-Meiji administrative unit for Hokkaido (1869-1882) | |
| 開発部 | かいはつぶ | development department | |
| 組織開発 | そしきかいはつ | organization development; organizational development; OD | |
| 開平 | かいへい | extraction of square root | n3 |
| 開庁 | かいちょう | opening a government office (for the day); opening a new government office | n2 |
| 自己開示 | じこかいじ | self-disclosure | |
| 能力開発校 | のうりょくかいはつこう | skill development school | |
| 開きなおる | ひらきなおる | to become defiant; to fight back; to turn upon; to take the offensive | |
| 開室 | かいしつ | opening (e.g. library, museum, etc); being open; making a room accessible to people; (organization) being available to take on work | |
| 開発途上国 | かいはつとじょうこく | developing country | |
| ソフトウェア開発 | ソフトウェアかいはつ | software development | |
| 開発計画 | かいはつけいかく | development project (program, programme, plan) | |
| ゲーム開発 | ゲームかいはつ | game development | |
| 展開図 | てんかいず | interior elevation; expansion plan (of a ship); net (of a polyhedron); development | |
| 疎開者 | そかいしゃ | evacuee | |
| 開山堂 | かいさんどう | temple hall commemorating its founding or its founder | |
| 開閉器 | かいへいき | switch | |
| 試合開始 | しあいかいし | start of a match; beginning of a game; kickoff | |
| 開始時刻 | かいしじこく | starting time | |
| 開錠 | かいじょう | unlocking | n4 |
| 開張 | かいちょう | public exhibition (of a Buddhist image); displaying (a Buddhist image); revealing (something that is supposed to remain hidden); opening (a gambling house) | n2 |
| 開板 | かいはん | publishing (esp. using woodblock printing) | |
| 口開け | くちあけ | opening (of a bottle); broaching; beginning; opening | |
| 打開策 | だかいさく | plan to overcome an obstacle or break out of a deadlock; breakthrough solution | |
| 開発環境 | かいはつかんきょう | development environment | |
| 開発プロセス | かいはつプロセス | development process | |
| 開披 | かいひ | opening (a letter); unsealing | n3 |
| 開創 | かいそう | initial opening (esp. of a temple) | n1 |
| 開拓地 | かいたくち | reclaimed land; cleared land; area opened for development | |
| 西部開拓 | せいぶかいたく | settlement of the American frontier; settlement of the Old West | |
| 資源開発 | しげんかいはつ | resource development; resource exploitation (usu. natural resources) | |
| 開け払う | あけはらう | to open; to vacate | |
| 開腹手術 | かいふくしゅじゅつ | laparotomy (abdominal surgery) | |
| 開栓 | かいせん | unstopping; uncorking; uncapping; opening | n1 |
| 開立 | かいりゅう | extraction of cubic root | |
| 開脚 | かいきゃく | spreading the legs (wide apart); opening the legs | |
| 前開き | まえあき | front-opening | |
| 急展開 | きゅうてんかい | rapid development; rapid unfolding | |
| 新展開 | しんてんかい | new development | |
| 新開発 | しんかいはつ | new development; new discovery | |
| 未開拓 | みかいたく | undeveloped (area); unexplored (field of study); wild (areas); untapped area | |
| 株式公開 | かぶしきこうかい | stock offering (to the public) | |
| 独自開発 | どくじかいはつ | independently developed; proprietary | |
| 開発許可 | かいはつきょか | development permit | |
| 蔵開き | くらびらき | first opening of warehouse after New Year | |
| 開回路 | かいかいろ | open circuit | |
| 開拗音 | かいようおん | contracted sound | |
| 開放性 | かいほうせい | openness | |
| 改革開放 | かいかくかいほう | Reform and Opening-up (Chinese economic policy) | |
| 未開拓地 | みかいたくち | undeveloped area | |
| 未開社会 | みかいしゃかい | a primitive society | |
| 都市開発 | としかいはつ | urban development | |
| 開缶 | かいかん | opening a can | n1 |
| 開学 | かいがく | establishment of a university | |
| 開胸 | かいきょう | thoracotomy | |
| 横展開 | よこてんかい | horizontal deployment (of techniques, etc.); application to other fields | |
| 背開き | せびらき | slicing a fish down its back | |
| 開口率 | かいこうりつ | aperture ratio | |
| 開発費 | かいはつひ | development cost | |
| 和同開珎 | わどうかいちん | wadō kaichin; Japan's first circulated coinage (minted in 708 CE) | |
| 開けたて | あけたて | opening and shutting; opening and closing | |
| 電源開発 | でんげんかいはつ | development of electrical power resources | |
| 不動産開発 | ふどうさんかいはつ | real estate development | |
| 開腹 | かいふく | making an incision in the abdomen; performing a laparotomy | n2 |
| 海開き | うみびらき | opening of the beachgoing season | |
| 開き封 | ひらきふう | unsealed mail | |
| 開墾地 | かいこんち | cultivated land | |
| 開花日 | かいかび | day of blooming | |
| 海洋開発 | かいようかいはつ | ocean development | |
| 詰め開き | つめひらき | bargaining; negotiation; turning one's body to the left or right and standing (when leaving the presence of nobility, etc.); sailing close-hauled | |
| 運転再開 | うんてんさいかい | resumption of service (train, bus, etc.) | |
| 開眼供養 | かいげんくよう | ceremony to consecrate a newly made Buddhist statue or image by inserting the eyes (thereby investing it with soul) | |
| 都市再開発 | としさいかいはつ | urban redevelopment | |
| 株式公開買付 | かぶしきこうかいかいつけ | tender offer; take-over bid; TOB | |
| 水資源開発公団 | みずしげんかいはつこうだん | Water Resources Development Public Corporation | |
| アプリケーション開発 | アプリケーションかいはつ | application development | |
| 開宴 | かいえん | opening of a banquet; opening of a wedding reception | n1 |
| 開村 | かいそん | creating a new village or town; opening a village (e.g. for Olympic athletes) | |
| 開経 | かいきょう | prefatory sutra; opening a sutra; beginning to read a sutra | |
| 不開港 | ふかいこう | closed port | |
| 満開日 | まんかいび | first day of cherry blossoms reaching full bloom; first day in which at least 80% of the somei yoshino cherry blossom has opened (in a specific region or place) | |
| 開放値 | かいほうち | f-number; focal ratio; f-ratio; f-stop | |
| 開腹術 | かいふくじゅつ | laparotomy | |
| 受託開発 | じゅたくかいはつ | entrusted development; original equipment manufacturer; OEM | |
| 嶺上開花 | リンシャンカイホウ | winning hand formed by drawing a replacement tile after declaring a kong | |
| 総合開発 | そうごうかいはつ | integrated development | |
| 門戸開放 | もんこかいほう | open door policy | |
| 開発事業 | かいはつじぎょう | development (work) | |
| 開発言語 | かいはつげんご | development language | |
| 開票結果 | かいひょうけっか | results of the vote count | |
| 開票速報 | かいひょうそくほう | quick (flash) report of votes counted | |
| 開発経済学 | かいはつけいざいがく | development economics | |
| アジャイル開発 | アジャイルかいはつ | agile (software) development | |
| 開札 | かいさつ | opening or unsealing of bids | n3 |
| 幕開 | まくあき | rise of the curtain; opening of a play; beginning (e.g. of an era); start | |
| 開度 | かいど | divergence; aperture | |
| 開式 | かいしき | opening of a ceremony | |
| 公開状 | こうかいじょう | open letter | |
| 未開人 | みかいじん | barbarian; savage; savage (primitive) people (race) | |
| 炉開き | ろびらき | opening the winter hearth | |
| 開会日 | かいかいび | opening day | |
| 開幕編 | かいまくへん | opening act; introductory part | |
| 開放創 | かいほうそう | open wound | |
| 開発機 | かいはつき | development machine; experimental machine | |
| 開被覆 | かいひふく | open cover | |
| 開通式 | かいつうしき | formal opening (e.g. of a railway, road, etc.); opening ceremony; inauguration ceremony | |
| 開集合 | かいしゅうごう | open set | |
| 公開処刑 | こうかいしょけい | public execution; public embarrassment | |
| 公開書簡 | こうかいしょかん | open letter | |
| 国際展開 | こくさいてんかい | international expansion | |
| 学童疎開 | がくどうそかい | evacuation of school children (from major cities to more rural areas, esp. during late World War II) | |
| 未公開株 | みこうかいかぶ | unlisted stocks; unlisted shares; unquoted shares | |
| 開発独裁 | かいはつどくさい | developmental dictatorship (authoritarian form of government that pursues rapid economic development at the expense of democratic freedoms) | |
| 開発領主 | かいはつりょうしゅ | local warriors, or provincial or district officials, who developed paddy field lands | |
| 開運商法 | かいうんしょうほう | fraudulent business of selling goods by claiming they will bring supernatural benefits | |
| 公開討論会 | こうかいとうろんかい | open forum | |
| 新製品開発 | しんせいひんかいはつ | new product development | |
| 開けっぴろげ | あけっぴろげ | wide-open; frank; open; candid | |
| オフショア開発 | オフショアかいはつ | offshore development | |
| 開悟 | かいご | wisdom; enlightenment | n3 |
| 開扉 | かいひ | opening a door | n3 |
| 開架 | かいか | open access (in a library); open shelves | n2 |
| 開坑 | かいこう | opening of mine | n1 |
| 開湯 | かいとう | opening of a hot spring or bathhouse | n1 |
| 開衿 | かいきん | unbuttoning a collar; opening up (one's heart); open-necked shirt | n1 |
| 開頭 | かいとう | craniotomy | n1 |
| 開先 | かいさき | groove (in welding) | |
| 開枕 | かいちん | bringing out the pillows and futon (in Zen Buddhism); sleeping | |
| 開裂 | かいれつ | (bond) cleavage; splitting open | |
| へき開 | へきかい | cleavage (in gems) | |
| 外開き | そとびらき | opening outward (of a door or window) | |
| 展開式 | てんかいしき | expansion | |
| 未開地 | みかいち | savage (barbaric) land; backward region; undeveloped area | |
| 未開発 | みかいはつ | undeveloped (countries); backward; unentered | |
| 核開発 | かくかいはつ | nuclear development | |
| 開さく | かいさく | excavation; cutting; digging | |
| 開化丼 | かいかどん | bowl of rice topped with beef (or pork) and egg | |
| 開口期 | かいこうき | dilatation stage (of labour) | |
| 開成所 | かいせいじょ | Kaiseijo (school of foreign studies set up by the shogunate during the Edo period) | |
| 開架式 | かいかしき | making materials in a library available in open stacks | |
| 開票率 | かいひょうりつ | percentage of votes counted so far | |
| 公開裁判 | こうかいさいばん | open court | |
| 宇宙開闢 | うちゅうかいびゃく | (since) the beginning of the universe; (since) the dawn of time | |
| 市場展開 | しじょうてんかい | market expansion | |
| 市場開拓 | しじょうかいたく | market development | |
| 無血開城 | むけつかいじょう | capitulation without resistance; surrendering without fighting | |
| 開き直す | ひらきなおす | to reopen (e.g. a file, window); to open again | |
| 開店休業 | かいてんきゅうぎょう | being open but having virtually no business | |
| 開発経緯 | かいはつけいい | features (e.g. of a product); development chronology | |
| 開発費用 | かいはつひよう | development cost | |
| 開花前線 | かいかぜんせん | (cherry) blossom front; flower front | |
| 一般開業医 | いっぱんかいぎょうい | general practitioner in private practice; primary care physician (US); GP | |
| 医薬品開発 | いやくひんかいはつ | drug development | |
| 帝王切開術 | ていおうせっかいじゅつ | Caesarean section; Cesarean section; C-section | |
| 蓋を開ける | ふたをあける | to open the lid; to lift a lid; to open the lid (on); to make public | |
| 人間開発指数 | にんげんかいはつしすう | human development index | |
| アジア開発銀行 | アジアかいはつぎんこう | Asian Development Bank | |
| 開散 | かいさん | divergence (of the eyes) | n2 |
| 開方 | かいほう | extraction of roots; evolution | n2 |
| 開法 | かいほう | extraction of roots; evolution | n2 |
| 開炉 | かいろ | first lighting of the hearth in a Zen temple (first day of the 10th or 11th month) | n2 |
| 開咬 | かいこう | open bite; apertognathia | n1 |
| 開渠 | かいきょ | open ditch; open channel; open conduit; open culvert | n1 |
| 開管 | かいかん | open pipe | n1 |
| 創開 | そうかい | grand opening | |
| 劈開 | へきかい | cleavage (in gems) | |
| 続開 | ぞっかい | resumption; continuing | |
| 開け | ひらけ | beginning; start; civilization; civilisation | |
| 開映 | かいえい | beginning of a screening (at a movie theatre); starting a screening | |
| 開梱 | かいこん | open (as of a pack) | |
| 開浴 | かいよく | bathing (in a Zen Temple) | |
| 開版 | かいはん | publishing (esp. using woodblock printing) | |
| 開銀 | かいぎん | development bank | |
| 開音 | かいおん | long "o" vowel arising from combination of the "a" and "u" sounds | |
| 乱開発 | らんかいはつ | environmentally damaging (indiscriminate) development | |
| 伸開線 | しんかいせん | involute | |
| 公開文 | こうかいぶん | public text | |
| 公開株 | こうかいかぶ | publicly traded stock; stock listed on the stock exchange | |
| 内開き | うちびらき | opening inward (of a door or window) | |
| 半開国 | はんかいこく | underdeveloped country; half-civilized country; half-civilised country | |
| 夜開草 | やかいそう | moonflower (Ipomoea alba) | |
| 小開ひ | しょうかいひ | opening a door for a moment (esp. on the train, when someone's foot is stuck, etc.) | |
| 小開扉 | しょうかいひ | opening a door for a moment (esp. on the train, when someone's foot is stuck, etc.) | |
| 御開き | おひらき | breakup (of a ceremony, wedding, party, meeting, etc.); closure | |
| 旋開橋 | せんかいきょう | swing bridge; swivel bridge | |
| 昇開橋 | しょうかいきょう | lift bridge | |
| 未開国 | みかいこく | uncivilized country | |
| 未開墾 | みかいこん | uncultivated; wild | |
| 本開き | ほんびらき | functioning cuff buttons on a jacket (i.e. those that can be buttoned and unbuttoned); surgeon's cuffs | |
| 片開き | かたびらき | single door (as opposed to a double door) | |
| 穴開き | あなあき | pierced; drilled; perforated; hollow | |
| 穴開け | あなあけ | drilling; hole punching | |
| 翼開張 | よくかいちょう | wingspan (of a bird); wingspread | |
| 翼開長 | よくかいちょう | wingspan (of a bird); wingspread | |
| 能開大 | のうかいだい | polytechnic college (with two-year and four-year courses) | |
| 能開法 | のうかいほう | Vocational Abilities Development Promotion Act | |
| 腹開き | はらびらき | slicing a fish along its belly | |
| 華開く | はなひらく | to blossom; to flower; to bloom; to flower (of a civilization, talent, etc.) | |
| 蓋開け | ふたあけ | opening; beginning; commencement | |
| 裂開果 | れっかいか | dehiscent fruit | |
| 裾開き | スソアキ | open skirt; opening on one or both sides of edge territory, allowing the opponent to jump in | |
| 言開き | いいひらき | excuse; explanation; justification; vindication | |
| 言開く | いいひらく | to justify; to explain; to vindicate | |
| 詰開き | つめひらき | bargaining; negotiation; turning one's body to the left or right and standing (when leaving the presence of nobility, etc.); sailing close-hauled | |
| 超展開 | ちょうてんかい | abrupt plot change; unexpected story development; story development from out of left field | |
| 跳開橋 | ちょうかいきょう | bascule bridge; drawbridge | |
| 鍵開け | かぎあけ | lock-opening; lock-picking | |
| 開かる | はだかる | to be separated (of clothing); to be exposed; to be wide open; to stand with one's limbs apart | |
| 開き口 | ひらきぐち | aperture | |
| 開き癖 | ひらきぐせ | warp (on the page or cover of a book, making it splay open) | |
| 開き足 | ひらきあし | folding trestle legs; hiraki-ashi; lateral foot displacement (kendo) | |
| 開き鯵 | ひらきあじ | split and dried saurel | |
| 開け口 | あけくち | opening; pull tab | |
| 開催式 | かいさいしき | opening ceremony (of an event, show, etc.) | |
| 開創器 | かいそうき | retractor | |
| 開区間 | かいくかん | open interval | |
| 開口具 | かいこうぐ | open mouth gag | |
| 開口器 | かいこうき | mouth gag | |
| 開口数 | かいこうすう | numerical aperture (in photography) | |
| 開口音 | かいこうおん | (of Chinese) pronunciation of kanji without a medial between the initial consonant and center vowel; (of Japanese) the long "o" vowel arising from combination of the "a" and "u" sounds | |
| 開店花 | かいてんばな | opening day flower gift; bouquet of flowers given to a new store (restaurant, etc.) on its opening day | |
| 開心術 | かいしんじゅつ | open-heart surgery | |
| 開戦派 | かいせんは | war party; warmonger | |
| 開拓村 | かいたくそん | pioneer settlement; frontier village | |
| 開教師 | かいきょうし | Buddhist missionary, esp. in Jodo, Pure Land, etc. sects; Buddhist minister (in the West) | |
| 開校式 | かいこうしき | school opening ceremony | |
| 開水路 | かいすいろ | open channel (liquid flow) | |
| 開瞼器 | かいけんき | eyelid speculum; lid retractor | |
| 開票所 | かいひょうじょ | ballot-counting place | |
| 開経偈 | かいきょうげ | opening chant of a sutra | |
| 開缶器 | かいかんき | punch-style can opener (punches a round or V-shaped hole in a can of liquid) | |
| 開胸術 | かいきょうじゅつ | thoracotomy | |
| 開花丼 | かいかどん | bowl of rice topped with beef (or pork) and egg | |
| 開閉所 | かいへいじょ | switching station; switchyard | |
| 開閉橋 | かいへいきょう | movable bridge | |
| 開閉機 | かいへいき | mechanical device for opening and closing (shutters, gates, etc.); (railway) crossing gate; barrier | |
| 開音節 | かいおんせつ | open syllable | |
| 開頭術 | かいとうじゅつ | craniotomy | |
| 面開発 | めんかいはつ | large-scale housing and lifestyle development project | |
| おっ開く | おっぴらく | to do something in public; to open | |
| 人才開発 | じんざいかいはつ | human resources development; personnel development; career development; HRD | |
| 人財開発 | じんざいかいはつ | human resources development; personnel development; career development; HRD | |
| 会陰切開 | えいんせっかい | episiotomy; perineotomy | |
| 低開発国 | ていかいはつこく | underdeveloped country; developing country | |
| 体を開く | たいをひらく | to stand upright with arms and/or legs spread; to dodge | |
| 公開かぎ | こうかいかぎ | public key | |
| 公開の席 | こうかいのせき | in public | |
| 公開キー | こうかいキー | public key | |
| 公開会社 | こうかいがいしゃ | public company; publicly listed company; publicly traded company; (Japanese) stock company that does not impose restrictions on share transfers | |
| 公開入札 | こうかいにゅうさつ | open bid or tender | |
| 公開外交 | こうかいがいこう | open diplomacy | |
| 公開捜査 | こうかいそうさ | open criminal investigation | |
| 公開期間 | こうかいきかん | open period | |
| 公開討論 | こうかいとうろん | public debate; open discussion | |
| 公開録音 | こうかいろくおん | public recording | |
| 共同疎開 | きょうどうそかい | community evacuation | |
| 切り開き | きりひらき | clearing (land); excavating | |
| 切開手術 | せっかいしゅじゅつ | surgical operation | |
| 前を開く | まえをひらく | to show one's privates | |
| 南開大学 | みなみびらきだいがく | Nankai University | |
| 即日開票 | そくじつかいひょう | same-day counting of ballots | |
| 口を開く | くちをひらく | to open one's mouth (to talk); to (start to) tell | |
| 同時展開 | どうじてんかい | simultaneous development; spreading at the same time (e.g. two phenomena) | |
| 国土開発 | こくどかいはつ | national land development (e.g. building infrastructure, roads, etc.) | |
| 園庭開放 | えんていかいほう | opening up a kindergarten playground to young children and parents from the local area | |
| 土俵開き | どひょうびらき | opening ceremony for the new ring in a stable | |
| 地域開発 | ちいきかいはつ | regional development; community development | |
| 局面打開 | きょくめんだかい | breakthrough in the situation; break in the deadlocked situation | |
| 市場開放 | しじょうかいほう | opening up of a market; market liberalization | |
| 幕が開く | まくがあく | the curtain opens (for the start of a play, act, etc.); the curtain rises; to start (of a play); to start (of an event, campaign, etc.) | |
| 店を開く | みせをひらく | to open a business | |
| 引開ける | ひきあける | to pull open | |
| 強制疎開 | きょうせいそかい | forced evacuation | |
| 心を開く | こころをひらく | to open up to someone else; to divulge one's true feelings; to be openhearted | |
| 押開ける | おしあける | to force open; to push open | |
| 捩開ける | ねじあける | to wrench open | |
| 散開星団 | さんかいせいだん | open cluster | |
| 新装開店 | しんそうかいてん | reopening a shop after renovation; post-refurbishment reopening | |
| 未開墾地 | みかいこんち | virgin soil; uncultivated land | |
| 未開野蛮 | みかいやばん | primitive and barbarous; uncivilized and barbaric | |
| 気管切開 | きかんせっかい | tracheotomy | |
| 水平展開 | すいへいてんかい | involvement of peer groups; application to similar products; grassroots (organization, development, movement) | |
| 活路開拓 | かつろかいたく | developing a way or means | |
| 申し開き | もうしひらき | excuse; explanation; justification; defense | |
| 目を開く | めをひらく | to open one's eyes; to open one's eyes (to the truth, a new way of thinking, etc.); to awaken; to discover | |
| 眉を開く | まゆをひらく | to feel relieved; to forget about one's troubles; to settle into peace of mind | |
| 眼を開く | めをひらく | to open one's eyes; to open one's eyes (to the truth, a new way of thinking, etc.); to awaken; to discover | |
| 穴が開く | あながあく | to have a hole; to be pierced (with a hole) | |
| 穴開き銭 | あなあきせん | perforated coin | |
| 穴開け器 | あなあけき | (hole) punch; stiletto | |
| 端を開く | たんをひらく | to provide impetus | |
| 緒を開く | いとぐちをひらく | to find a clue; to make a beginning | |
| 縁故疎開 | えんこそかい | evacuating to the homes of one's relatives in the countryside in wartime | |
| 股を開く | またをひらく | to spread one's legs; to agree to have sex (for a woman) | |
| 自主開発 | じしゅかいはつ | independent development | |
| 舞台開き | ぶたいびらき | formal opening of a new theater (theatre) | |
| 見世開き | みせびらき | starting a business; opening a store (for the day) | |
| 角膜切開 | かくまくせっかい | keratotomy; corneal incision | |
| 言い開く | いいひらく | to justify; to explain; to vindicate | |
| 記録開始 | きろくかいし | record start | |
| 詰開きで | つめひらきで | at close reach (sailing); at close haul | |
| 転迷開悟 | てんめいかいご | casting away one's vices or worldly desires and achieving enlightenment | |
| 近日公開 | きんじつこうかい | coming soon (e.g. of a movie); soon to be released; soon to be made public | |
| 道を開く | みちをひらく | to open up a path; to clear a path; to open up doors; to pave the way | |
| 配備開始 | はいびかいし | start of deployment | |
| 開かずの | あかずの | unopened; forbidden | |
| 開かれる | ひらかれる | to be opened; to be held (of a meeting, party, etc.); to be open (i.e. unrestricted); to be opened up | |
| 開き治る | ひらきなおる | to become defiant; to fight back; to turn upon; to take the offensive | |
| 開けごま | ひらけごま | open sesame! | |
| 開けゴマ | ひらけごま | open sesame! | |
| 開け広げ | あけひろげ | unguarded; frank; open | |
| 開け放し | あけはなし | leaving open; leaving ajar; outspoken; frank | |
| 開け渡す | あけわたす | to vacate; to surrender (e.g. a castle); to give up (e.g. a position); to hand over (e.g. power) | |
| 開け立て | あけたて | just opened | |
| 開け胡麻 | ひらけごま | open sesame! | |
| 開け閉め | あけしめ | opening and closing; opening and shutting | |
| 開ループ | かいループ | open-loop | |
| 開会の辞 | かいかいのじ | opening address | |
| 開始タグ | かいしタグ | beginning tag; starting tag; opening tag | |
| 開始価格 | かいしかかく | starting price; ask price; ask; suggested opening price | |
| 開始反応 | かいしはんのう | initiation reaction | |
| 開始変数 | かいしへんすう | starting variable; SV | |
| 開巻劈頭 | かいかんへきとう | very beginning of a book | |
| 開幕投手 | かいまくとうしゅ | opening-game pitcher | |
| 開店時間 | かいてんじかん | opening hours (of a store, restaurant, etc.) | |
| 開廊時間 | かいろうじかん | opening hours of a gallery | |
| 開拓精神 | かいたくせいしん | frontier spirit | |
| 開放経済 | かいほうけいざい | open economy | |
| 開放骨折 | かいほうこっせつ | open fracture | |
| 開析台地 | かいせきだいち | dissected plateau | |
| 開発主義 | かいはつしゅぎ | developmentalism | |
| 開発拠点 | かいはつきょてん | development block; development base | |
| 開発能力 | かいはつのうりょく | development capability | |
| 開発輸入 | かいはつゆにゅう | develop-and-import formula | |
| 開管分析 | かいかんぶんせき | open tube test | |
| 開運招福 | かいうんしょうふく | bringing luck and good fortune | |
| 開闢以来 | かいびゃくいらい | since the beginning of the world; since the dawn of history | |
| 開頭手術 | かいとうしゅじゅつ | craniotomy | |
| 鯵の開き | あじのひらき | horse mackerel, cut open and dried | |
| M字開脚 | エムじかいきゃく | spreading one's legs open wide with knees bent, creating the shape of the letter M (pornographic pose) | |
| ねじ開ける | ねじあける | to wrench open | |
| ぶち開ける | ぶちあける | to forcefully open up (a hole; in a wall, etc.); to speak frankly; to open one's heart; to throw out (everything inside) | |
| アジの開き | あじのひらき | horse mackerel, cut open and dried | |
| クロス開発 | クロスかいはつ | cross development | |
| プール開き | プールびらき | opening of a pool (e.g. for the summer season) | |
| 作戦開始日 | さくせんかいしび | start day for military operation; departure day; D-Day | |
| 信書開封罪 | しんしょかいふうざい | (crime of) opening sealed correspondence | |
| 信書開披罪 | しんしょかいひざい | (crime of) opening sealed correspondence | |
| 全科開業医 | ぜんかかいぎょうい | general practitioner; GP | |
| 公開図書館 | こうかいとしょかん | public library | |
| 公開文種別 | こうかいぶんしゅべつ | public text class | |
| 公開文言語 | こうかいぶんげんご | public text language | |
| 公開文記述 | こうかいぶんきじゅつ | public text description | |
| 公開識別子 | こうかいしきべつし | public identifier | |
| 公開質問状 | こうかいしつもんじょう | open letter (of inquiry) | |
| 公開鍵基盤 | こうかいかぎきばん | Public Key Infrastructure | |