| 古い | ふるい | old; aged; ancient; antiquated | n5 |
| 稽古 | けいこ | practice; practising; training; study | |
| 古代 | こだい | ancient times; distant past; antiquity | n1 |
| 古く | ふるく | anciently; formerly; old times; a long time ago | |
| 古語辞典 | こごじてん | dictionary of archaisms | |
| 名古屋 | なごや | Nagoya (city) | |
| 古来 | こらい | from ancient times; from old times; from time immemorial | |
| 古典 | こてん | classic (work, esp. book); the classics | n2 |
| 古風 | こふう | old-fashioned; archaic; antique; antiquated | n2 |
| 古 | いにしえ | antiquity; ancient times; bygone days; former times | |
| 古今 | ここん | ancient and modern times; all ages; past and present | n1 |
| 古びる | ふるびる | to look old; to get old | n1 |
| 中古 | ちゅうこ | used; second-hand; old; Middle Ages (in Japan esp. Heian period) | n3 |
| 古人 | こじん | ancient people | n3 |
| 最古 | さいこ | the oldest; the earliest | n1 |
| 中古車 | ちゅうこしゃ | used car; secondhand car | |
| 古事記 | こじき | Kojiki (earliest historical record of Japan, compiled in 712 CE); Records of Ancient Matters | |
| 古武術 | こぶじゅつ | ancient Japanese martial arts | |
| 古ぼける | ふるぼける | to look old; to become time-worn; to become worn out; to become old and grubby | |
| 太古 | たいこ | ancient times; prehistoric times | |
| 古語 | こご | archaic word; obsolete word; archaism; old saying | |
| 古墳 | こふん | ancient burial mound; barrow; tumulus | |
| 反古 | ほご | wastepaper; scrap paper | n2 |
| 古めかしい | ふるめかしい | old-fashioned; ancient-looking; time-worn | n1 |
| 古本屋 | ふるほんや | secondhand bookshop; secondhand bookstore; secondhand bookseller | |
| 古着 | ふるぎ | old clothes; secondhand clothing | n3 |
| 古書 | こしょ | old book; rare book; classic; secondhand book | n1 |
| 古道具 | ふるどうぐ | old furniture; curios; secondhand goods | |
| 古武道 | こぶどう | ancient Japanese martial arts | |
| 考古学 | こうこがく | archaeology; archeology | n1 |
| 古色 | こしょく | faded color; faded colour; antique look | |
| 古本 | ふるほん | secondhand book; ancient book; antiquarian books | n3 |
| 古文 | こぶん | ancient writing (Edo-period or older); classical literature; ancient Chinese character (pre-Qin period); Chinese character script used before the Qin period | |
| 古木 | こぼく | old tree | |
| 千古 | せんこ | all ages; great antiquity; eternity | |
| 古文書 | こもんじょ | historical document; archives; old manuscript; paleograph | |
| 好古 | こうこ | love of antiquities | |
| 復古 | ふっこ | revival; restoration | |
| 古城 | こじょう | old castle; old fortress | |
| 古物 | こぶつ | antique; old article; secondhand goods | |
| 古流 | こりゅう | old manners; old style; old school (of art) | |
| 古参 | こさん | senior; veteran; old-timer | |
| 古る | ふる | to age; to get old | n5 |
| 古典的 | こてんてき | classical; classic | |
| 古老 | ころう | old person (knowledgeable about events of the distant past); elderly person; elder | |
| 古河 | ふるかわ | old river | |
| 古寺 | こじ | old temple | n1 |
| 古巣 | ふるす | old haunts; former homes | |
| 擬古 | ぎこ | imitation of classical styles | |
| 古代中国 | こだいちゅうごく | ancient China | |
| 上古 | じょうこ | ancient times | |
| 古川 | ふるかわ | old river | |
| 古池 | ふるいけ | old pool; old pond | |
| 古戦場 | こせんじょう | ancient battlefield | |
| 古狸 | ふるだぬき | old badger; veteran; oldtimer; schemer | |
| 古くさい | ふるくさい | stale; old fashioned; hackneyed; trite | |
| 考古 | こうこ | study of antiquities; archaeology; archeology | |
| 古民家 | こみんか | old Japanese-style house | |
| 懐古 | かいこ | reminiscence; nostalgia; thinking fondly of the past; recalling the old days | n1 |
| 古臭い | ふるくさい | stale; old fashioned; hackneyed; trite | |
| 古都 | こと | ancient city; former capital | n1 |
| お稽古 | おけいこ | practice; training | |
| 古手 | ふるて | used article; worn-out article; veteran; old-timer | |
| 古典文学 | こてんぶんがく | classical literature | |
| 古式 | こしき | old style; ancient rites | |
| 古雅 | こが | classical elegance; antiquity | |
| 寒稽古 | かんげいこ | mid-winter training | |
| 中古品 | ちゅうこひん | secondhand article; secondhand goods; used item | |
| 手古摺る | てこずる | to have much trouble; to have a hard time; to not know how to handle | n1 |
| 古家 | ふるいえ | old house; deserted house | |
| 古墳時代 | こふんじだい | Kofun period (of Japanese history, 250-538 CE); Tumulus period | |
| 古事 | こじ | historical event; ancient event; tradition; folklore | n1 |
| 使い古す | つかいふるす | to wear out (something) | |
| 万古 | ばんこ | perpetuity; eternity | |
| 着古し | きふるし | old clothes; worn-out clothes; cast-off clothes | |
| 往古 | いにしえ | antiquity; ancient times; bygone days; former times | |
| 古紙 | こし | used paper; paper for recycling | n4 |
| 古代ギリシア | こだいギリシャ | ancient Greece | |
| 古蹟 | こせき | historic spot; historic site; place of historical interest; historic remains | |
| 古今和歌集 | こきんわかしゅう | Kokin Wakashū (Heian-period collection of poetry) | |
| 古伝 | こでん | legend; tradition | |
| 古跡 | こせき | historic spot; historic site; place of historical interest; historic remains | |
| 古詩 | こし | ancient poems | n4 |
| 閑古鳥 | かんこどり | cuckoo | |
| 古物商 | こぶつしょう | antiques business; curio dealer; secondhand dealer | |
| 古代ローマ | こだいローマ | ancient Rome | |
| 中古マンション | ちゅうこマンション | second-hand condominium; previously owned apartment | |
| 新古 | しんこ | old and new (thing); old, but unused | |
| お古 | おふる | used article (esp. clothes) | |
| 古傷 | ふるきず | old wound; scar; unpleasant past experience; painful memory | |
| 名古屋帯 | なごやおび | common variety of women's kimono sash | |
| 古顔 | ふるがお | familiar face; old timer | |
| 出稽古 | でげいこ | giving lessons at pupils' homes; going to train in stable other than your own | |
| 古名 | こめい | old name; former name | |
| 古刹 | こさつ | ancient temple | |
| 古里 | ふるさと | hometown; birthplace; native place; one's old home | n3 |
| 古往今来 | こおうこんらい | in all ages; since antiquity | |
| 古代エジプト | こだいエジプト | ancient Egypt | |
| 古屋 | ふるいえ | old house; deserted house | |
| 蒼古 | そうこ | old-fashioned and tasteful | n3 |
| 近古 | きんこ | early modern age | n1 |
| 古代ギリシャ | こだいギリシャ | ancient Greece | |
| 古記 | こき | ancient records | |
| 稽古場 | けいこば | training room (hall); gymnasium | |
| 古刀 | ことう | old sword; old katana; kotō; old sword | |
| 古美術 | こびじゅつ | antiques; old works of art | |
| 蒙古 | もうこ | Mongolia (region); Greater Mongolia; Mongolian Plateau; Mongols (nomadic tribe) | |
| 古稀 | こき | 70th birthday; ancient Greek (language) | |
| 古希 | こき | 70th birthday; ancient Greek (language) | |
| 古武士 | ふるつわもの | feudal warrior; samurai; old soldier; veteran | |
| 古道 | こどう | old road; ancient road; ancient methods; ancient moral teachings | n1 |
| 古今集 | こきんしゅう | Collection of Poems of Ancient and Modern Times | |
| 古筆 | こひつ | old writing | |
| 古細菌 | こさいきん | archaea; archaebacteria | |
| 古昔 | こせき | ancient times | |
| 古材 | こざい | re-used wooden materials; recycled furnishings | |
| 古学 | こがく | classical studies | |
| 古銭 | こせん | old coin | |
| 前古 | ぜんこ | old times; ancient days | |
| 古典派 | こてんは | classical school | |
| 古史 | こし | ancient history | n4 |
| 古松 | こしょう | old pine | n3 |
| 名古屋大学 | なごやだいがく | Nagoya University | |
| 古金 | ふるがね | scrap iron; scrap metal | |
| 古酒 | こしゅ | well-cured sake; last year's sake; old sake | |
| 古代紫 | こだいむらさき | reddish-purple | |
| 古株 | ふるかぶ | old-timer; veteran; senior; old stump | |
| 古俗 | こぞく | old custom | |
| 古狐 | ふるきつね | old fox; old-timer; schemer | |
| 古格 | こかく | convention; usage; old customs; old etiquette | |
| 下稽古 | したげいこ | rehearsal; run-through; practice | |
| 古代文明 | こだいぶんめい | ancient civilization; ancient civilisation | |
| 古地図 | こちず | old map; antique map | |
| 言い古す | いいふるす | to say repeatedly; to say proverbially | |
| 古字 | こじ | ancient character (esp. Chinese); ancient writing | n1 |
| 古形 | こけい | old form; old format; traditional format | n1 |
| 古町 | こちょう | old town | n1 |
| 古布 | こふ | recycled cloth | |
| 古訓 | こくん | ancient precepts; ancient teachings; old reading (of kanji or kanbun) | |
| 古楽 | こがく | ancient (early) music | |
| 名古屋鉄道 | なごやてつどう | Nagoya Railroad Co.; Meitetsu | |
| 古称 | こしょう | old name; former name | n3 |
| 尚古 | しょうこ | respect for olden days | n2 |
| 古疵 | ふるきず | old wound; scar; unpleasant past experience; painful memory | |
| 古代史 | こだいし | ancient history | |
| 古強者 | ふるつわもの | feudal warrior; samurai; old soldier; veteran | |
| 古着屋 | ふるぎや | second hand clothes shop | |
| 古神道 | こしんとう | ancient Shinto (as practiced prior to the introduction of Confucianism and Buddhism to Japan) | |
| 古書店 | こしょてん | secondhand bookshop; antiquarian bookshop | |
| 古兵 | ふるつわもの | feudal warrior; samurai; old soldier; veteran | |
| 古鉄 | ふるがね | scrap iron; scrap metal | |
| 古体 | こたい | old custom; old style | n2 |
| 稽古日 | けいこび | day for one's lesson | |
| 古典主義 | こてんしゅぎ | classicism | |
| 古典芸能 | こてんげいのう | classical theatre; classical theater | |
| 古伊万里 | こいまり | mid-Edo period Imari ware | |
| 考古学的 | こうこがくてき | archeological; archaeological | |
| 古制 | こせい | ancient establishment; ancient laws | n2 |
| 古拙 | こせつ | artless but attractive in a quaint sense | |
| 天手古舞 | てんてこまい | whirl of busyness; flurry of activity; being rushed off one's feet; having a very busy time (doing) | n1 |
| 古諺 | こげん | old saying; old expression; old language; ancient language | |
| 古英語 | こえいご | old English | |
| 稽古着 | けいこぎ | training clothes (judo, kendo, etc.); practice suit | |
| 古き良き | ふるきよき | good old; good old-fashioned | |
| 古生物学 | こせいぶつがく | paleontology | |
| 考古学者 | こうこがくしゃ | archeologist; archaeologist | |
| 古泉 | こせん | old coin | |
| 古潭 | こたん | old abyss | |
| 古生物 | こせいぶつ | extinct plants and animals | |
| 中古物件 | ちゅうこぶっけん | pre-owned (real estate) property; used property; existing home | |
| 古美術品 | こびじゅつひん | antique; antique artwork | |
| 古層 | こそう | layers of history | |
| 古言 | こげん | old saying; old expression; old language; ancient language | |
| 古音 | こおん | ko-on; ancient reading; reading of a kanji based on Zhou, Han and Wei dynasty Chinese | |
| 曠古 | こうこ | historic; unprecedented | |
| 古今東西 | ここんとうざい | all times and places; all ages and countries | |
| 古米 | こまい | old rice; rice remaining from the previous year's harvest | |
| 古生代 | こせいだい | Paleozoic era | |
| 古美術商 | こびじゅつしょう | antique art dealer; antique dealer; antiquary | |
| 古画 | こが | ancient painting | |
| 古葉 | ふるば | old leaf; old leaves | |
| 王政復古 | おうせいふっこ | restoration of imperial rule; Restoration (England) | |
| 阿古屋貝 | あこやがい | Marten's pearl oyster (Pinctada fucata martensii); Akoya pearl oyster | |
| 古地 | こち | former residence; former land; place remembered for a connection to someone | |
| 古血 | ふるち | impure blood | |
| 古豪 | こごう | veteran; old-timer; experienced person | |
| 古代人 | こだいじん | the ancients; ancient people | |
| 古筆家 | こひつか | expert in old writing | |
| 復古調 | ふっこちょう | reactionary tendency; revivalist mood; tendency to revert to old customs | |
| 名古屋市立大学 | なごやしりつだいがく | Nagoya City University | |
| 中古本 | ちゅうこぼん | used book; secondhand book | |
| 古写本 | こしゃほん | old manuscript; codex | |
| 古漬け | ふるづけ | well-pickled vegetables | |
| 朝稽古 | あさげいこ | early-morning practice | |
| 古祠 | こし | old small shrine | n4 |
| 古態 | こたい | former appearance; original form | n2 |
| 古歌 | こか | old poem (esp. waka); old song | |
| 古漬 | ふるづけ | well-pickled vegetables | |
| 古義 | こぎ | old meaning; old interpretation | |
| 古典学 | こてんがく | classics; classical studies | |
| 最古参 | さいこさん | oldest member of a group; longest-serving member | |
| 古事記伝 | こじきでん | Commentary on the Kojiki (by Motoori Norinaga, 1798); Commentary on Records of Ancient Matters | |
| 懐古趣味 | かいこしゅみ | nostalgia for the good old days; taste for the past; retro tastes | |
| 中古日本語 | ちゅうこにほんご | Early Middle Japanese | |
| ぶつかり稽古 | ぶつかりげいこ | head-to-head training; drill consisting of pushing and being pushed; battering practice | |
| 古址 | こし | historic ruins; foundations of an ancient building | n4 |
| 古服 | ふるふく | old clothes; old suit | |
| 古注 | こちゅう | commentaries of the ancients | |
| 古典語 | こてんご | classical or dead languages | |
| 古新聞 | ふるしんぶん | old newspapers | |
| 古社寺 | こしゃじ | old shrines and temples | |
| 古記録 | こきろく | historical document written without a particular addressee (e.g. a diary) | |
| 形稽古 | かたげいこ | form refinement training | |
| 懐古厨 | かいこちゅう | nostalgic person; person who prefers the good old days; fuddy-duddy | |
| 懐古的 | かいこてき | nostalgic; old-fashioned | |
| 新古車 | しんこしゃ | as-new car (for sale); pre-registered car; ex-demo car; demonstrator car | |
| 稽古事 | けいこごと | accomplishments; taking lessons (in dance, music, tea ceremony, flower arranging, etc.) | |
| 中古住宅 | ちゅうこじゅうたく | pre-owned home; previously owned home; existing home | |
| 復古主義 | ふっこしゅぎ | reactionism | |
| 考古資料 | こうこしりょう | archeological materials; archeological artifacts | |
| 古義真言宗 | こぎしんごんしゅう | Kogi Shingon ("Old Shingon" school of Buddhism) | |
| 名古屋場所 | なごやばしょ | Nagoya Tournament (held in July) | |
| 古馬 | こば | horses 4 or more years old (usu. in racing) | |
| 中古音 | ちゅうこおん | Middle Chinese | |
| 古文字 | こもじ | kanji (as opposed to kana) | |
| 古時計 | ふるどけい | antique clock; old clock | |
| 古雑誌 | ふるざっし | old magazines | |
| 古今独歩 | ここんどっぽ | unmatched in history; unequaled in history | |
| 古典古代 | こてんこだい | classical antiquity; Greek and Roman eras | |
| 古典音楽 | こてんおんがく | classical music | |
| 舞台稽古 | ぶたいげいこ | dress rehearsal | |
| 古謡 | こよう | traditional (folk) song | n1 |
| 古例 | これい | old precedent; tradition; custom | |
| 古曲 | こきょく | old music | |
| 古期 | こき | old; ancient | |
| 御古 | おふる | used article (esp. clothes) | |
| 盤古 | ばんこ | Pangu; creator of heaven and earth in Chinese mythology | |
| 代稽古 | だいげいこ | substitute teaching | |
| 古代米 | こだいまい | ancient rice varieties; wild rice | |
| 古代裂 | こだいぎれ | ancient cloth fragment | |
| 稽古台 | けいこだい | training partner; training hall (esp. one made of wooden planks and used for dancing practice) | |
| 古典力学 | こてんりきがく | classical mechanics | |
| 古文書学 | こもんじょがく | study of historical documents; diplomatics; diplomatic; paleography | |
| 古道具屋 | ふるどうぐや | secondhand store | |
| 古馴染み | ふるなじみ | old friend | |
| 新古典派 | しんこてんは | neoclassicism | |
| 考古学界 | こうこがくかい | archeological world (archaeological); world of archeology; archeological circles | |
| 古典物理学 | こてんぶつりがく | classical physics | |
| 名古屋商科大学 | なごやしょうかだいがく | Nagoya University of Commerce and Business Administration | |
| 名古屋女子大学 | なごやじょしだいがく | Nagoya Women's University | |
| 名古屋学院大学 | なごやがくいんだいがく | Nagoya Gakuin University | |
| 古意 | こい | ancient ways; the feelings of the ancients | n4 |
| 古聖 | こせい | ancient sage | n2 |
| 古墨 | こぼく | old ink stick | |
| 古方 | こほう | old method | |
| 古法 | こほう | old method; old law | |
| 古琴 | こきん | guqin (Chinese seven-string zither) | |
| 古訳 | こやく | pre-Kumarajiva Chinese translation (i.e. before the 5th century) | |
| 古靴 | ふるぐつ | old shoes | |
| 上古音 | しょうこおん | Old Chinese phonology | |
| 反古紙 | ほごがみ | wastepaper; scrap paper | |
| 古々米 | ここまい | rice remaining from the harvest two years ago; old rice | |
| 古代語 | こだいご | ancient Japanese (as spoken in Japan until the Middle Ages) | |
| 古伝説 | こでんせつ | old tradition | |
| 古備前 | こびぜん | Bizen sword (mid-Heian to early Kamakura periods); ancient Bizen ware (Kamakura to early Momoyama periods) | |
| 古古米 | ここまい | rice remaining from the harvest two years ago; old rice | |
| 古女房 | ふるにょうぼう | good old wife; one's wife of many years | |
| 古帛紗 | こぶくさ | kobukusa (type of high-quality silk wrapper used in tea ceremony) | |
| 古王国 | こおうこく | old kingdom; ancient kingdom | |
| 地稽古 | じげいこ | training by two participants of the same skill level (kendo); general training involving all six types (kendo) | |
| 擬古文 | ぎこぶん | classical style | |
| 蒙古斑 | もうこはん | Mongolian spot; Mongolian blue spot; congenital dermal melanocytosis | |
| 近古音 | きんこおん | Early Modern Chinese | |
| 乎古止点 | をことてん | diacritical marks used for interpreting classical Chinese | |
| 古代文字 | こだいもじ | ancient script; ancient character; ancient alphabet | |
| 古典時代 | こてんじだい | the classical period | |
| 宮古上布 | みやこじょうふ | high quality hemp cloth from Miyakojima (Okinawa prefecture) | |
| 動物考古学 | どうぶつこうこがく | archaeozoology; archeozoology; zooarchaeology | |
| 古典派音楽 | こてんはおんがく | music of the classical period | |
| 天文考古学 | てんもんこうこがく | archaeoastronomy; archeoastronomy | |
| 海洋考古学 | かいようこうこがく | marine archaeology; underwater archaeology | |
| 琉球古武術 | りゅうきゅうこぶじゅつ | Okinawan kobudo; traditional martial arts of the Ryukyu Islands | |
| 西洋古典学 | せいようこてんがく | Western classical studies; classics | |
| 名古屋工業大学 | なごやこうぎょうだいがく | Nagoya Institute of Technology | |
| 名古屋経済大学 | なごやけいざいだいがく | Nagoya Economics University | |
| 名古屋芸術大学 | なごやげいじゅつだいがく | Nagoya University of Arts | |
| 名古屋音楽大学 | なごやおんがくだいがく | Nagoya College of Music | |
| 古趾 | こし | historic ruins; foundations of an ancient building | n4 |
| 今古 | きんこ | now and anciently | n1 |
| 古賢 | こけん | ancient sage | n1 |
| 天手古舞い | てんてこまい | whirl of busyness; flurry of activity; being rushed off one's feet; having a very busy time (doing) | n1 |
| 亘古 | こうこ | for ever; from ancient times | |
| 亙古 | こうこ | from long ago up until the present day | |
| 先古 | せんこ | ancient times | |
| 古え | いにしえ | antiquity; ancient times; bygone days; former times | |
| 古き | ふるき | old; olden | |
| 古す | ふるす | to wear out | |
| 古仏 | こぶつ | ancient statue of Buddha | |
| 古儀 | こぎ | ancient rites | |
| 古創 | ふるきず | old wound; scar; unpleasant past experience; painful memory | |
| 古句 | こく | ancient expression; old poem | |
| 古器 | こき | antique vessel; antique utensil; antique | |
| 古塚 | ふるづか | ancient burial mound; old grave; tumulus | |
| 古女 | ごまめ | dried young anchovies (or sardines) | |
| 古廟 | こびょう | old shrine | |
| 古扇 | ふるおうぎ | old fan; worn out fan | |
| 古版 | こはん | old edition (of a book); old woodblock | |
| 古筝 | こそう | guzheng (type of ancient Chinese zither) | |
| 古箏 | こそう | guzheng (type of ancient Chinese zither) | |
| 古糊 | ふるのり | aged paste; microbially fermented weak adhesive for restoration of Japanese works of art on paper | |
| 古美 | ふるび | treating a metal surface to make it look worn and aged; antique finish | |
| 古茶 | こちゃ | last year's tea | |
| 古草 | ふるくさ | last year's grass; dead grass | |
| 古註 | こちゅう | commentaries of the ancients | |
| 古説 | こせつ | ancient belief | |
| 古譚 | こたん | old tale | |
| 古迹 | こせき | historic spot; historic site; place of historical interest; historic remains | |
| 古陶 | ことう | old pottery; antique porcelain | |
| 奇古 | きこ | old and strange | |
| 独古 | とっこ | single-pronged vajra; tokko; dokko; copper or iron implement, pointed at both ends, used in esoteric Buddhist rituals | |
| 築古 | ちくふる | old construction (esp. in real estate); old building | |
| 上古史 | じょうこし | ancient history | |
| 中古文 | ちゅうこぶん | Heian-period kana writing | |
| 中古語 | ちゅうこご | Early Middle Japanese | |
| 内蒙古 | うちもうこ | Inner Mongolia (China) | |
| 反古籠 | ほぐかご | wastebasket | |
| 古ける | ふるける | to become old; to become worn out | |
| 古井戸 | ふるいど | old unused well | |
| 古人骨 | こじんこつ | ancient human skeleton; archaeological human remains | |
| 古代切 | こだいぎれ | ancient cloth fragment | |
| 古切れ | ふるぎれ | old cloth; old rags | |
| 古加涅 | コカイン | cocaine | |
| 古医方 | こいほう | Edo-period school of Chinese medicine based on pre-Jin and Yuan teachings | |
| 古印紙 | こいんし | used stamps | |
| 古参兵 | こさんへい | long-serving soldier; veteran | |
| 古参者 | こさんしゃ | senior; old timer | |
| 古史伝 | こしでん | Commentary on Ancient History (by Hirata Atsutane, 1825) | |
| 古史徴 | こしちょう | References to Ancient History (by Hirata Atsutane, 1818) | |
| 古地理 | こちり | past geography | |
| 古墳人 | こふんじん | Kofun people; people of the Kofun period | |
| 古文学 | こぶんがく | paleography; the study of ancient writings | |
| 古書展 | こしょてん | exhibition of rare (old, antiquarian) books | |
| 古書市 | こしょいち | secondhand book fair | |
| 古本市 | ふるほんいち | secondhand book fair; antiquarian book market | |
| 古板本 | こはんぽん | old woodblock-printed book from the Muromachi period or earlier | |
| 古気候 | こきこう | paleoclimate | |
| 古泉学 | こせんがく | numismatics | |
| 古渡り | こわたり | old imported article (esp. a precious item imported during or before the Muromachi period) | |
| 古版本 | こはんぽん | old woodblock-printed book from the Muromachi period or earlier | |
| 古物市 | ふるものいち | antique market; flea market; jumble market; used-goods market | |
| 古生界 | こせいかい | Paleozoic group | |
| 古皮質 | こひしつ | paleocortex (palaeocortex); paleopallium | |
| 古窯址 | こようし | ruins of old kilns; old kiln sites | |
| 古窯趾 | こようし | ruins of old kilns; old kiln sites | |
| 古賀派 | こがは | Koga Faction (of the LDP) | |
| 古銭学 | こせんがく | numismatics | |
| 古顎類 | こがくるい | paleognaths (birds of the infraclass Paleognathae); palaeognaths | |
| 喜佐古 | きさご | Umbonium costatum (species of sea snail) | |
| 土耳古 | トルコ | Turkey; Türkiye; turquoise | |
| 外蒙古 | がいもうこ | Outer Mongolia | |
| 太古代 | たいこだい | Archaeozoic (Archeozoic) Era | |
| 宮古蟇 | みやこひきがえる | Miyako toad (Bufo gargarizans miyakonis) | |
| 山稽古 | やまげいこ | outdoor practice | |
| 御稽古 | おけいこ | practice; training | |
| 徴古館 | ちょうこかん | museum (esp. with collections of old objects) | |
| 新古品 | しんこひん | new old stock; NOS; unused goods of old manufacture | |
| 新古本 | しんこぼん | remaindered book; discounted new book | |
| 猛稽古 | もうげいこ | strenuous training; intense training | |
| 着古す | きふるす | to wear out (clothing) | |
| 稽古本 | けいこぼん | practice book used in jōruri and nagauta | |
| 立版古 | たてばんこ | papercraft sculpture representing a scene akin to a painting | |
| 立稽古 | たちげいこ | rehearsal | |
| 蒙古人 | もうこじん | Mongol; Mongolian | |
| 蒙古族 | もうこぞく | Mongolian people | |
| 蒙古症 | もうこしょう | mongolism; Down's syndrome | |
| 蒙古襞 | もうこひだ | epicanthus; epicanthic fold; epicanthal fold | |
| 蒙古語 | もうこご | Mongolian (language) | |
| 言古す | いいふるす | to say repeatedly; to say proverbially | |
| 赤古里 | チョゴリ | chogori; jeogori; short jacket traditionally worn by Koreans | |
| 金古美 | きんふるび | antique gold finish | |
| 銀古美 | ぎんふるび | antique silver finish | |
| いい古す | いいふるす | to say repeatedly; to say proverbially | |
| 一人稽古 | ひとりげいこ | practicing by oneself; self-instruction | |
| 七十古希 | しちじゅうこき | men seldom live to be seventy; few people live to be seventy | |
| 万古不易 | ばんこふえき | eternally unchanging | |
| 三番稽古 | さんばんげいこ | a row of training matches with the same opponent | |
| 中古良品 | ちゅうこりょうひん | used item in good condition | |
| 云い古す | いいふるす | to say repeatedly; to say proverbially | |
| 互角稽古 | ごかくけいこ | training by participants of the same skill level (kendo) | |
| 人類最古 | じんるいさいこ | oldest mankind (e.g. evidence of) | |
| 使い古し | つかいふるし | worn-out | |
| 千古万古 | せんこばんこ | remote antiquity; ancient times; the remote past | |
| 千古不易 | せんこふえき | eternally unchanging | |
| 千古不滅 | せんこふめつ | everlasting; unchangeable; immortal | |
| 千古不磨 | せんこふま | permanence; immortality; eternity | |
| 古々々米 | こここまい | rice remaining from the harvest three years ago | |
| 古々しい | ふるぶるしい | very old | |
| 古きよき | ふるきよき | good old; good old-fashioned | |
| 古き佳き | ふるきよき | good old; good old-fashioned | |
| 古くから | ふるくから | from long ago; from old times; from time immemorial | |
| 古だぬき | ふるだぬき | old badger; veteran; oldtimer; schemer | |
| 古なじみ | ふるなじみ | old friend | |
| 古ぼけた | ふるぼけた | worn-out; threadbare; timeworn; weathered | |
| 古ギツネ | ふるきつね | old fox; old-timer; schemer | |
| 古事来歴 | こじらいれき | origin and history; particulars | |
| 古人類学 | こじんるいがく | paleoanthropology | |
| 古今無双 | ここんむそう | unparalleled in history | |
| 古今無類 | ここんむるい | best ever | |
| 古代裂れ | こだいぎれ | ancient cloth fragment | |
| 古典学者 | こてんがくしゃ | classicist; classical scholar | |
| 古典楽器 | こてんがっき | Japanese classical musical instruments | |
| 古動物学 | こどうぶつがく | paleozoology | |
| 古古しい | ふるぶるしい | very old | |
| 古古古米 | こここまい | rice remaining from the harvest three years ago | |
| 古呆けた | ふるぼけた | worn-out; threadbare; timeworn; weathered | |
| 古呆ける | ふるぼける | to look old; to become time-worn; to become worn out; to become old and grubby | |
| 古地理学 | こちりがく | paleogeography; palaeogeography | |
| 古天文学 | こてんもんがく | archaeoastronomy; archeoastronomy | |
| 古惚けた | ふるぼけた | worn-out; threadbare; timeworn; weathered | |
| 古惚ける | ふるぼける | to look old; to become time-worn; to become worn out; to become old and grubby | |
| 古書体学 | こしょたいがく | palaeography; paleography | |
| 古植物学 | こしょくぶつがく | paleobotany; paleophytology | |
| 古気候学 | こきこうがく | paleoclimatology | |
| 古物商人 | こぶつしょうにん | antiques dealer | |
| 古生態学 | こせいたいがく | paleoecology | |
| 古異歯類 | こいしるい | Paleoheterodonta (subclass of bivalve molluscs) | |
| 古病理学 | こびょうりがく | paleopathology | |
| 古美術店 | こびじゅつてん | antique store; antique shop | |
| 古自動車 | ふるじどうしゃ | used car | |
| 古色蒼然 | こしょくそうぜん | antique-looking; looking hoary with patina | |
| 古語拾遺 | こごしゅうい | Gleanings from Ancient Stories (Inbe no Hironari, 807 CE); historical record from the Inbe clan | |
| 古遠部鉱 | ふるとおべこう | furutobeite | |
| 古銭学者 | こせんがくしゃ | numismatist | |
| 古風土記 | こふどき | ancient fudoki compiled by imperial order in 713 CE | |
| 名古屋人 | なごやじん | Nagoyan; person from Nagoya | |
| 名所古跡 | めいしょこせき | scenic sites and historic places; places of natural beauty and historic interest | |
| 土耳古石 | トルコいし | turquoise (mineral) | |
| 尚古主義 | しょうこしゅぎ | classicism; primitivism | |
| 履き古し | はきふるし | worn-out shoes; worn-out socks | |
| 履き古す | はきふるす | to wear out; to wear until threadbare | |
| 往古より | おうこより | from times immemorial; from ancient times | |
| 往古来今 | おうこらいこん | in all ages; since antiquity | |
| 復古神道 | ふっこしんとう | Fukko Shinto; Restoration Shinto; Reform Shinto (prominent 18th century form of Shinto, based on the classics, and free from Confucian and Buddhist influences) | |
| 復古論者 | ふっころんしゃ | reactionary | |
| 持ち古す | もちふるす | to have long in use | |
| 推古時代 | すいこじだい | Suiko period (i.e. the Asuka period, esp. under the reign of Empress Suiko, approx. 592-628 CE) | |
| 擬古主義 | ぎこしゅぎ | archaism; pseudoclassicism | |
| 擬古典的 | ぎこてんてき | pseudoclassic | |
| 新古書店 | しんこしょてん | secondhand bookstore dealing in relatively new books | |
| 東西古今 | とうざいここん | all times and places; everywhen and everywhere | |
| 横綱稽古 | よこづなけいこ | practice session where grand champion is present | |
| 温古知新 | おんこちしん | developing new ideas based on study of the past; learning from the past | |
| 独り稽古 | ひとりげいこ | practicing by oneself; self-instruction | |
| 稽古ごと | けいこごと | accomplishments; taking lessons (in dance, music, tea ceremony, flower arranging, etc.) | |
| 立ち稽古 | たちげいこ | rehearsal | |
| 立て版古 | たてばんこ | papercraft sculpture representing a scene akin to a painting | |
| 蒙古ひだ | もうこひだ | epicanthus; epicanthic fold; epicanthal fold | |
| 蒙古ヒダ | もうこひだ | epicanthus; epicanthic fold; epicanthal fold | |
| 蒙古人種 | もうこじんしゅ | Mongoloid race | |
| 蒙古帝国 | もうこていこく | Mongol Empire | |
| 蒙古野馬 | もうこのうま | Przewalski's horse (Equus ferus przewalskii); Dzungarian horse | |
| 語り古す | かたりふるす | to say repeatedly (often by many people); to say over and over again | |
| 通し稽古 | とおしげいこ | full rehearsal; dress rehearsal; run-through | |
| 遠古登点 | をことてん | diacritical marks used for interpreting classical Chinese | |
| 頭が古い | あたまがふるい | old-fashioned (in one's way of thinking) | |
| 反古にする | ほごにする | to throw away as useless; to scrap; to make null and void; to renege | |
| 古つわもの | ふるつわもの | feudal warrior; samurai; old soldier; veteran | |
| 古び衰える | ふるびおとろえる | to waste away | |
| 古ノルド語 | こノルドご | Old Norse | |
| 古久根建設 | こくねけんせつ | Kokune Corporation | |
| 古事つける | こじつける | to distort; to strain (an interpretation); to stretch (the meaning of a word) | |
| 古典主義者 | こてんしゅぎしゃ | classicist | |
| 古典論理学 | こてんろんりがく | classical logic | |
| 古典量子論 | こてんりょうしろん | classical quantum theory | |
| 古川美術館 | ふるかわびじゅつかん | Furukawa Art Museum | |
| 古式床しい | こしきゆかしい | traditional | |
| 古期造山帯 | こきぞうざんたい | old orogenic belt; mountain belts formed in the Palaeozoic era | |
| 古物営業法 | こぶつえいぎょうほう | Secondhand Articles Business Act | |
| 古生植物学 | こせいしょくぶつがく | paleobotany | |
| 古生物学者 | こせいぶつがくしゃ | paleontologist | |
| 古訓古事記 | こくんこじき | Kojiki with Ancient Readings (by Nagase Masachi, 1803) | |
| 名古屋走り | なごやばしり | Nagoya driving; bad driving for which Nagoya residents are known | |
| 團平喜佐古 | だんべいきさご | Umbonium giganteum (species of sea snail) | |
| 場の古典論 | ばのこてんろん | classical field theory | |
| 宮古島花蕨 | みやこじまはなわらび | kamraj (Helminthostachys zeylanica); tunjuk-langit; di wu gong | |
| 島土禰利古 | シマトネリコ | Himalayan ash (Fraxinus griffithii); Griffith's ash | |
| 掛かり稽古 | かかりげいこ | kakari geiko; training performed by an attacker and a defender | |
| 新古典主義 | しんこてんしゅぎ | neoclassicism | |
| 新古典学派 | しんこてんがくは | neoclassical school (of economics) | |
| 稽古場経費 | けいこばけいひ | allowance paid by the Sumo Association to a coach for each wrestler in his stable | |
| 聖書考古学 | せいしょこうこがく | Biblical archaeology | |
| 聞き古した | ききふるした | trite; hackneyed | |
| 蒙古ガゼル | もうこガゼル | Mongolian gazelle (Procapra gutturosa); zeren | |
| 見取り稽古 | みとりけいこ | learning from observing others | |
| 内蒙古自治区 | うちもうこじちく | Inner Mongolia Autonomous Region (China) | |
| 古きよき時代 | ふるきよきじだい | the good old days; halcyon days | |
| 古き良き時代 | ふるきよきじだい | the good old days; halcyon days | |
| 古典ラテン語 | こてんラテンご | classical Latin | |
| 古典仮名遣い | こてんかなづかい | historical kana orthography (used before 1946 reform); old kana orthography | |
| 古式ゆかしい | こしきゆかしい | traditional | |