| 解説 | かいせつ | explanation; commentary; exposition; elucidation | n2 |
| 説明 | せつめい | explanation; exposition; description; account | n4 |
| 小説 | しょうせつ | novel; story; (work of) fiction | n4 |
| 説 | せつ | theory; doctrine; opinion; view | n2 |
| 説く | とく | to explain; to preach; to advocate; to persuade | n1 |
| 用語解説 | ようごかいせつ | glossary | |
| 伝説 | でんせつ | legend; folklore; tradition | n1 |
| 演説 | えんぜつ | speech; address | n1 |
| 説教 | せっきょう | sermon; preaching; homily; remonstration | n2 |
| 口説く | くどく | to persuade; to urge; to coax; to solicit | |
| 学説 | がくせつ | theory | n1 |
| 小説家 | しょうせつか | novelist; fiction writer | |
| 説得 | せっとく | persuasion | n2 |
| 諸説 | しょせつ | various opinions; various theories; various rumors (rumours) | |
| 仮説 | かせつ | hypothesis; supposition; assumption; tentative theory | n1 |
| 一説 | いっせつ | one theory; one opinion; another theory | |
| 説法 | せっぽう | lecture; sermon; preaching; scolding | |
| 遊説 | ゆうぜい | election tour; election campaign; stumping | |
| 風説 | ふうせつ | rumor; rumour; gossip; hearsay | |
| 力説 | りきせつ | emphasizing (a point, argument, etc.); stressing; insistence; arguing strongly (for, against) | |
| 説話 | せつわ | tale; narrative | |
| 説明会 | せつめいかい | information session; briefing; explanatory meeting | |
| 短編小説 | たんぺんしょうせつ | short story | |
| 概説 | がいせつ | overview; outline; rough summary | |
| 逆説 | ぎゃくせつ | paradox | |
| 説得力 | せっとくりょく | persuasiveness; powers of persuasion; cogency | n2 |
| 説明書 | せつめいしょ | (printed) instructions; manual; explanatory leaflet (pamphlet, note); description | |
| 説き伏せる | ときふせる | to confute; to argue down; to persuade; to convince | |
| 定説 | ていせつ | established theory; accepted opinion; accepted explanation | n1 |
| 俗説 | ぞくせつ | common saying; popular version; folklore; tradition | |
| 論説 | ろんせつ | article; discourse; dissertation; (written) argument | n1 |
| 自説 | じせつ | one's personal opinion | n1 |
| 所説 | しょせつ | explanation; matter under discussion; contents; one's opinion | |
| 言説 | げんせつ | remark; statement; discourse | |
| 異説 | いせつ | different view; alternative theory; dissenting view | |
| 都市伝説 | としでんせつ | urban legend | |
| 説諭 | せつゆ | admonition; warning; advising (against); reproof | |
| 口説 | くぜつ | lovers' tiff; quarrel between lovers; chattering; idle talk | |
| 図説 | ずせつ | illustration; diagram | |
| 口説き | くどき | entreaty; imploring; begging; spoken portion of a song | |
| 私小説 | ししょうせつ | I-novel; novel narrated in the first person | |
| 詳説 | しょうせつ | detailed explanation | n4 |
| 補説 | ほせつ | supplementary explanation; supplementary information | |
| 説きつける | ときつける | to persuade | |
| 仏説 | ぶっせつ | Buddha's teaching | |
| 通説 | つうせつ | prevailing view; common opinion; commonly accepted theory | n1 |
| 新説 | しんせつ | new theory | n1 |
| 社説 | しゃせつ | editorial; leading article; leader | |
| 臆説 | おくせつ | hypothesis; speculation; surmise; conjecture | |
| 解説書 | かいせつしょ | (instruction) manual; handbook | |
| 説破 | せっぱ | confuting; arguing down | |
| 取扱説明書 | とりあつかいせつめいしょ | user's manual; instruction manual; operation manual | |
| 説明文 | せつめいぶん | explanatory note; explanatory text; explanation; caption | |
| 説話集 | せつわしゅう | collection of stories (esp. myths, legends, etc.) | |
| 掻き口説く | かきくどく | to plead; to urge; to pester; to beg | |
| 説き明かす | ときあかす | to explain; to make clear; to elucidate; to illustrate | |
| 巷説 | こうせつ | gossip; talk about town | |
| 序説 | じょせつ | introduction | |
| 説経 | せっきょう | lecture on the sutras | n2 |
| 前説 | ぜんせつ | former opinion | |
| 伝説的 | でんせつてき | legendary; folkloric; traditional | |
| 浮説 | ふせつ | groundless rumor; groundless rumour | |
| 総説 | そうせつ | review article; general remarks | |
| 長編小説 | ちょうへんしょうせつ | (full-length) novel; long novel | |
| 演説会 | えんぜつかい | speech meeting; assembly to hear a speech | |
| 連続テレビ小説 | れんぞくテレビしょうせつ | morning soap opera; morning television serial | |
| 高説 | こうせつ | your excellent opinion | |
| 流説 | りゅうせつ | groundless rumor; groundless rumour; false report | |
| 時代小説 | じだいしょうせつ | historical novel | |
| 邪説 | じゃせつ | heretical doctrine | |
| 地動説 | ちどうせつ | heliocentric theory; Copernican theory; heliocentrism; heliocentricism | |
| 卓説 | たくせつ | excellent opinion | |
| 伝説上 | でんせつじょう | legendary; fabled; fabulous | |
| 珍説 | ちんせつ | odd theory; strange view; absurd opinion; strange story | |
| 解説者 | かいせつしゃ | commentator | |
| 説明的 | せつめいてき | explanatory; expository; elucidatory | |
| 説伏 | せっぷく | persuasion | |
| 講説 | こうせつ | explanation (by lecture) | |
| 説き付ける | ときつける | to persuade | |
| 持説 | じせつ | one's cherished opinion | n1 |
| 実説 | じっせつ | true story | |
| 叙説 | じょせつ | explanation; interpretation | |
| 推理小説 | すいりしょうせつ | mystery novel; detective novel; whodunit | n1 |
| 説経節 | せっきょうぶし | sutra-based ballads accompanied by the samisen | |
| 歴史小説 | れきししょうせつ | historical novel | |
| 略説 | りゃくせつ | outline; summary | |
| 虚説 | きょせつ | groundless rumor; groundless rumour | |
| 細説 | さいせつ | detailed explanation | |
| 天動説 | てんどうせつ | Ptolemaic theory; geocentric model; geocentrism | |
| 起源説 | きげんせつ | theory of origins; origin hypothesis | |
| 語源説 | ごげんせつ | etymological theory; etymology | |
| 状況説明 | じょうきょうせつめい | briefing; status report; explanation of the situation | |
| 辻説法 | つじせっぽう | street preaching | |
| 逆説的 | ぎゃくせつてき | paradoxical | |
| 再説 | さいせつ | repeated explanation | |
| 愚説 | ぐせつ | foolish opinion; idiotic view; one's (humble) opinion | |
| 小説化 | しょうせつか | novelization; turning into a novel | |
| 僻説 | へきせつ | prejudiced opinion; illogical view | |
| 連載小説 | れんさいしょうせつ | serial; serialized novel; serialised novel | |
| 説示 | せつじ | instructions; explanation | |
| 謬説 | びゅうせつ | fallacy; fallacious argument | |
| 探偵小説 | たんていしょうせつ | detective story | |
| 説伏せる | ときふせる | to confute; to argue down; to persuade; to convince | |
| 論説委員 | ろんせついいん | editorial writer | |
| 性善説 | せいぜんせつ | belief that human nature is fundamentally good | n1 |
| 椿説 | ちんせつ | odd theory; strange view; absurd opinion; strange story | |
| 補足説明 | ほそくせつめい | supplementary explanation | |
| 縷説 | るせつ | detailed explanation | |
| 重説 | じゅうせつ | reexplanation | |
| 五行説 | ごぎょうせつ | theory of the five elements (in Chinese philosophy: wood, fire, earth, metal and water); five phases theory; wuxing theory | |
| 詳細説明 | しょうさいせつめい | detailed explanation | |
| 説付ける | ときつける | to persuade | |
| 説明責任 | せつめいせきにん | accountability; being held accountable | |
| 予定説 | よていせつ | predestination | |
| 口説き落とす | くどきおとす | to persuade; to prevail upon; to win a woman's heart; to win over | |
| 説明者 | せつめいしゃ | briefer; elucidator; exponent; expositor | |
| 政治小説 | せいじしょうせつ | political novel | |
| 街頭演説 | がいとうえんぜつ | roadside speech; soapbox speech | |
| 会社説明会 | かいしゃせつめいかい | company information session | |
| 本地垂迹説 | ほんじすいじゃくせつ | manifestation theory (holding that Shinto gods are manifestations of buddhas) | |
| 真説 | しんせつ | true theory; true teachings | n4 |
| 変説 | へんせつ | change of opinion | |
| 曲説 | きょくせつ | false theory | |
| 官能小説 | かんのうしょうせつ | erotic novel; amorous novel; pornographic novel | |
| 説話文学 | せつわぶんがく | legendary literature; narrative literature | |
| 秘説 | ひせつ | secret theory | |
| 要説 | ようせつ | outline; summary | |
| 性悪説 | せいあくせつ | cynicism (of mankind); belief that human nature is fundamentally evil | |
| 演説者 | えんぜつしゃ | speaker | |
| 恋愛小説 | れんあいしょうせつ | love romance; love story; romance; romance story | |
| 英雄伝説 | えいゆうでんせつ | heroic legend; legend of heroes | |
| 憶説 | おくせつ | hypothesis; speculation; surmise; conjecture | |
| 説教師 | せっきょうし | preacher | |
| 陰謀説 | いんぼうせつ | conspiracy theory | |
| 道聴塗説 | どうちょうとせつ | shallow-minded mouthing of secondhand information | |
| 他説 | たせつ | other theories | |
| 弁説 | べんぜつ | dialectic demonstration; display of skill in explanation | |
| 有力説 | ゆうりょくせつ | popular theory; widely-accepted theory | |
| 伝記小説 | でんきしょうせつ | fictional biography; biographical novel | |
| 対立仮説 | たいりつかせつ | alternative hypothesis | |
| 少女小説 | しょうじょしょうせつ | novel for young girls | |
| 新聞小説 | しんぶんしょうせつ | novel serialized in a newspaper | |
| 説明書き | せつめいがき | (written) explanation; explanatory label (e.g. in a museum); information sign (e.g. at a tourist spot); instructions (e.g. for a product) | |
| 書簡体小説 | しょかんたいしょうせつ | novel written in epistolary style | |
| 同説 | どうせつ | the same opinion | |
| 空説 | くうせつ | groundless rumor or story (rumour) | |
| 名演説 | めいえんぜつ | excellent speech; masterly speech | |
| 中編小説 | ちゅうへんしょうせつ | novella; short novel | |
| 冒険小説 | ぼうけんしょうせつ | adventure story; novel of adventure | |
| 立会演説 | たちあいえんぜつ | campaign speech | |
| 旧説 | きゅうせつ | old theory; ancient ideas | |
| 中立説 | ちゅうりつせつ | neutral theory (of molecular evolution) | |
| 斉一説 | せいいつせつ | uniformitarianism | |
| 説教者 | せっきょうしゃ | preacher | |
| 遊説先 | ゆうぜいさき | campaign stop; stop on a speaking tour | |
| 仮説検定 | かせつけんてい | hypothesis testing; hypothesis test | |
| 全国遊説 | ぜんこくゆうぜい | nationwide election campaign | |
| 大河小説 | たいがしょうせつ | roman-fleuve; long novel; epic novel | |
| 怪奇小説 | かいきしょうせつ | Gothic novel; supernatural horror novel | |
| 民間説話 | みんかんせつわ | folk tale; folklore | |
| 現代小説 | げんだいしょうせつ | contemporary novel; modern novel | |
| 異端邪説 | いたんじゃせつ | heretical doctrine (thought, faith) | |
| 短篇小説 | たんぺんしょうせつ | short story | |
| 落人伝説 | おちゅうどでんせつ | legend concerning a fugitive clan | |
| 説き出す | ときいだす | to begin to speak; to begin to explain | |
| 趣旨説明 | しゅしせつめい | explanation of aim (esp. of a legislative bill); rationalization | |
| ゼルダの伝説 | ゼルダのでんせつ | The Legend of Zelda (video game franchise) | |
| 私説 | しせつ | personal opinion | n3 |
| 勧説 | かんぜい | urging; persuasion | |
| 原子説 | げんしせつ | atomic theory | |
| 古伝説 | こでんせつ | old tradition | |
| 大演説 | だいえんぜつ | harangue; fervent speech | |
| 細胞説 | さいぼうせつ | cell theory | |
| 隔離説 | かくりせつ | isolation theory | |
| 音義説 | おんぎせつ | theory that each sound in Japanese is associated with a certain meaning | |
| 風水説 | ふうすいせつ | feng shui; fengshui; feng shui tradition | |
| 中間小説 | ちゅうかんしょうせつ | middle-brow novel | |
| 伝奇小説 | でんきしょうせつ | fantasy novel; fantastic tale | |
| 大衆小説 | たいしゅうしょうせつ | novel for the masses; popular fiction; pulp | |
| 就任演説 | しゅうにんえんぜつ | inaugural speech | |
| 応援演説 | おうえんえんぜつ | campaign speech (endorsing a candidate); speech in support of a candidate | |
| 教養小説 | きょうようしょうせつ | novel about one's education, spiritual growth, etc.; Bildungsroman | |
| 白話小説 | はくわしょうせつ | novel written in colloquial Chinese | |
| 警察小説 | けいさつしょうせつ | detective story; police novel | |
| 通俗小説 | つうぞくしょうせつ | popular novel | |
| 長篇小説 | ちょうへんしょうせつ | (full-length) novel; long novel | |
| 青春小説 | せいしゅんしょうせつ | youth novel | |
| 風俗小説 | ふうぞくしょうせつ | novel depicting customs and manners of the day | |
| 動物園仮説 | どうぶつえんかせつ | zoo hypothesis (theory on why humanity has had no contact with extraterrestrial life) | |
| 奇説 | きせつ | bizarre theory; strange theory; wild theory | n4 |
| 師説 | しせつ | teacher's theory | n3 |
| 提説 | ていせつ | proposed theory; proposition | n1 |
| 関説 | かんせつ | allusion; alluding; related explanation | n1 |
| 余説 | よせつ | commentary; annotation; alternative theory | |
| 例説 | れいせつ | illustration (using an example) | |
| 取説 | とりせつ | user's manual; instruction manual | |
| 古説 | こせつ | ancient belief | |
| 名説 | めいせつ | excellent idea; great suggestion; excellent opinion | |
| 妄説 | ぼうせつ | fallacy; false report | |
| 確説 | かくせつ | established theory | |
| 精説 | せいせつ | detailed explanation | |
| 綜説 | そうせつ | review article; general remarks | |
| 衆説 | しゅうせつ | various theories | |
| 評説 | ひょうせつ | rumour; rumor; comment; commentary | |
| 説服 | せっぷく | persuasion | |
| 説述 | せつじゅつ | explaining an idea; exposition; explanation | |
| 迷説 | めいせつ | misdirected claim; incomprehensible idea | |
| 銘説 | めいせつ | excellent idea; great suggestion; excellent opinion | |
| 仮現説 | かげんせつ | docetism (theology) | |
| 兼愛説 | けんあいせつ | universal love (concept in Mohism) | |
| 分子説 | ぶんしせつ | molecular theory | |
| 前成説 | ぜんせいせつ | preformation (theory) | |
| 創造説 | そうぞうせつ | creationism | |
| 力本説 | りきほんせつ | dynamism | |
| 千年説 | せんねんせつ | millenarianism; millennialism; chiliasm | |
| 単性説 | たんせいせつ | monophysitism (theology) | |
| 反復説 | はんぷくせつ | biogenetic law; recapitulation theory (theory that ontogeny recapitulates phylogeny) | |
| 取り説 | とりせつ | user's manual; instruction manual | |
| 対応説 | たいおうせつ | correspondence theory (theory that a proposition is true if and only if it corresponds to the facts) | |
| 後成説 | こうせいせつ | epigenesis (theory) | |
| 快楽説 | かいらくせつ | hedonism | |
| 整合説 | せいごうせつ | coherence theory (theory that a proposition is true if it corresponds with a specified set of other propositions) | |
| 星雲説 | せいうんせつ | the nebular hypothesis | |
| 模写説 | もしゃせつ | copy theory | |
| 民約説 | みんやくせつ | social-contract theory | |
| 波動説 | はどうせつ | wave theory | |
| 活力説 | かつりょくせつ | vitalism | |
| 演説家 | えんぜつか | speaker; orator | |
| 直説法 | ちょくせつほう | indicative mood | |
| 相制説 | そうせいせつ | interactionism | |
| 社説面 | しゃせつめん | editorial page | |
| 童貞説 | どうていせつ | immaculate conception; virgin birth | |
| 解散説 | かいさんせつ | rumor of dissolution (rumour) | |
| 説及ぶ | ときおよぶ | to mention; to refer to; to touch upon | |
| 説明し | ときあかし | explanation; exposition | |
| 説起す | ときおこす | to begin an explanation (argument, story, etc.) | |
| 論説欄 | ろんせつらん | editorial column | |
| 遭遇説 | そうぐうせつ | tidal hypothesis (of the origin of the solar system); near-collision hypothesis | |
| つじ説法 | つじせっぽう | street preaching | |
| アジ演説 | アジえんぜつ | propaganda speech; inflammatory speech | |
| ピン説明 | ピンせつめい | pin-outs | |
| 三文小説 | さんもんしょうせつ | dime novel | |
| 世に説く | よにとく | to set forth; to put forward; to present for consideration; to explain the facts of life | |
| 中篇小説 | ちゅうへんしょうせつ | novella; short novel | |
| 作業仮説 | さぎょうかせつ | working hypothesis | |
| 処女小説 | しょじょしょうせつ | debut novel | |
| 卓上演説 | たくじょうえんぜつ | after-dinner speech; speech made at a dinner (luncheon) | |
| 各人各説 | かくじんかくせつ | everyone has his (her) own view; different people, different opinions | |
| 名論卓説 | めいろんたくせつ | excellent opinions and theories | |
| 四体液説 | よんたいえきせつ | humorism (ancient system of medicine); humoralism; humoral theory | |
| 基調演説 | きちょうえんぜつ | keynote speech | |
| 大道演説 | だいどうえんぜつ | street (soapbox) oratory; stump oratory | |
| 実験小説 | じっけんしょうせつ | experimental novel | |
| 家系伝説 | かけいでんせつ | family legend | |
| 寓意小説 | ぐういしょうせつ | allegory; allegorical tale | |
| 帰無仮説 | きむかせつ | null hypothesis | |
| 心理小説 | しんりしょうせつ | psychological novel | |
| 悪漢小説 | あっかんしょうせつ | picaresque novel | |
| 感精伝説 | かんせいでんせつ | myths of asexual conception from natural objects | |
| 成長小説 | せいちょうしょうせつ | novel of formation (education); novel of character development; novel which traces the intellectual, moral, spiritual or social development of a young person; Bildungsroman | |
| 扇情小説 | せんじょうしょうせつ | sultry novel; suggestive story | |
| 掌篇小説 | しょうへんしょうせつ | short short story | |
| 携帯小説 | けいたいしょうせつ | cell phone novel; literary work originally written on a cellular phone | |
| 時事解説 | じじかいせつ | news commentary; comments on the news | |
| 本格小説 | ほんかくしょうせつ | serious novel; genuinely attempted novel | |
| 武侠小説 | ぶきょうしょうせつ | swashbuckling stories; martial arts fiction; chivalric knight novels; wuxia xiaoshuo | |
| 法を説く | ほうをとく | to preach the truth | |
| 演説口調 | えんぜつくちょう | oratorical tone | |
| 激励演説 | げきれいえんぜつ | speech of encouragement; pep talk | |
| 犯罪小説 | はんざいしょうせつ | crime novel; crime fiction | |
| 猟奇小説 | りょうきしょうせつ | bizarre story (novel) | |
| 甘い小説 | あまいしょうせつ | sentimental novel | |
| 用不用説 | ようふようせつ | Lamarckian evolutionary theory in which individuals lose characteristics that are not used and develop characteristics that are often used | |
| 白鯨伝説 | はくげいでんせつ | The Legend of the Moby Dick (television series) | |
| 神婚説話 | しんこんせつわ | tale of a marriage between a human and a god | |
| 聖剣伝説 | せいけんでんせつ | Seiken Densetsu (lit: Holy Sword Legend), a.k.a. "... of Mana" (RPG series) | |
| 背景説明 | はいけいせつめい | background briefing; backgrounder | |
| 荻野学説 | おぎのがくせつ | Ogino theory (basis of the rhythm method) | |
| 街談巷説 | がいだんこうせつ | street gossips and idle rumors | |
| 説き及ぶ | ときおよぶ | to mention; to refer to; to touch upon | |
| 説き示す | ときしめす | to explain; to show; to demonstrate | |
| 説き起す | ときおこす | to begin an explanation (argument, story, etc.) | |
| 説き難い | ときにくい | difficult to explain | |
| 説勧める | ときすすめる | to persuade | |
| 説得上手 | せっとくじょうず | persuasiveness; skilled in the art of persuasion | |
| 説教坊主 | せっきょうぼうず | tub-thumping preacher; preacher (priest) who is good at delivering a sermon; pulpiteer | |
| 説教泥棒 | せっきょうどろぼう | preaching burglar; burglar who preaches at the victim about the methods of preventing similar crimes | |
| 説教臭い | せっきょうくさい | preachy; sanctimonious | |
| 説文解字 | せつもんかいじ | Shuowen Jiezi (first comprehensive dictionary of Chinese characters; 121 CE) | |
| 説明臭い | せつめいくさい | over-explanatory; overly expository; didactic; preachy | |
| 説起こす | ときおこす | to begin an explanation (argument, story, etc.) | |
| 諸説紛々 | しょせつふんぷん | divergent opinions abound; opinion is divided; there are many rumors afloat | |
| 諸説紛紛 | しょせつふんぷん | divergent opinions abound; opinion is divided; there are many rumors afloat | |
| 謎を説く | なぞをとく | to solve a mystery | |
| 身辺小説 | しんぺんしょうせつ | novel depicting the author's personal life; I-novel | |
| 追悼演説 | ついとうえんぜつ | funeral oration; funeral speech | |
| 遊説旅行 | ゆうぜいりょこう | stumping (electioneering) tour | |
| 道聴途説 | どうちょうとせつ | shallow-minded mouthing of secondhand information | |
| 郷土小説 | きょうどしょうせつ | local story | |
| 量子仮説 | りょうしかせつ | quantum hypothesis | |
| 高論卓説 | こうろんたくせつ | an excellent opinion; an insightful view | |
| 魂不死説 | たましいふしせつ | (theory of) the immortality of the soul | |
| かき口説く | かきくどく | to plead; to urge; to pester; to beg | |
| オペロン説 | オペロンせつ | operon theory (Jacob and Monod, 1961) | |
| ガイア仮説 | ガイアかせつ | Gaia hypothesis; Gaia theory; Gaia principle | |
| テレビ演説 | テレビえんぜつ | televised speech; TV address | |
| メンデル説 | メンデルせつ | Mendelism | |
| ラマルク説 | ラマルクせつ | Lamarckism | |
| 一人称小説 | いちにんしょうしょうせつ | first-person novel; novel written in the first person | |
| 中立進化説 | ちゅうりつしんかせつ | neutral theory of molecular evolution | |
| 交互作用説 | こうごさようせつ | interactionism | |
| 十二縁起説 | じゅうにえんぎせつ | Buddhist theory of the twelve-fold chain of causation, interdependent origination and co-dependent arising (San: pratītya-samutpāda); twelve causal links | |
| 千年王国説 | せんねんおうこくせつ | millenarianism; millennialism; chiliasm | |
| 口説き文句 | くどきもんく | chat-up line; pick-up line; (loving) words | |
| 口説き落す | くどきおとす | to persuade; to prevail upon; to win a woman's heart; to win over | |
| 地殻均衡説 | ちかくきんこうせつ | (theory of) isostasy | |
| 多原発生説 | たげんはっせいせつ | polygenesis | |
| 大陸移動説 | たいりくいどうせつ | theory of continental drift | |
| 天変地異説 | てんぺんちいせつ | catastrophism | |
| 天父受苦説 | てんふじゅくせつ | patripassianism (theology) | |
| 天皇機関説 | てんのうきかんせつ | theory of the Emperor as an organ of government | |
| 山上の説教 | さんじょうのせっきょう | Sermon on the Mount | |
| 帝王神権説 | ていおうしんけんせつ | theory of the divine right of kings | |
| 招待演説者 | しょうたいえんぜつしゃ | guest speaker | |
| 搔き口説く | かきくどく | to plead; to urge; to pester; to beg | |
| 断続平衡説 | だんぞくへいこうせつ | punctuated equilibrium (theory of evolutionary biology) | |
| 新トマス説 | しんトマスせつ | neo-Thomism | |
| 来賓演説者 | らいひんえんぜつしゃ | guest speaker | |
| 王権神授説 | おうけんしんじゅせつ | the theory of the divine right of kings | |
| 相互作用説 | そうごさようせつ | interactionism | |
| 社会契約説 | しゃかいけいやくせつ | social contract theory (e.g. Rousseau's) | |
| 社会派小説 | しゃかいはしょうせつ | socially aware novel | |
| 神仏同体説 | しんぶつどうたいせつ | kami-buddha syncretization theory (e.g. manifestation theory) | |
| 突然変異説 | とつぜんへんいせつ | mutationism | |
| 統計的仮説 | とうけいてきかせつ | statistical hypothesis | |
| 自然発生説 | しぜんはっせいせつ | theory of spontaneous generation | |
| 至福千年説 | しふくせんねんせつ | millenarianism; millennialism; chiliasm | |
| 言語相対説 | げんごそうたいせつ | theory of linguistic relativity | |
| 説きがたい | ときにくい | difficult to explain | |
| 説きにくい | ときにくい | difficult to explain | |
| 説き分ける | ときわける | to explain carefully or by making distinctions | |
| 説き勧める | ときすすめる | to persuade | |
| 説き明かし | ときあかし | explanation; exposition | |
| 説き起こす | ときおこす | to begin an explanation (argument, story, etc.) | |
| 説き述べる | ときのべる | to explain | |
| 説を立てる | せつをたてる | to put forward a theory | |
| 説教くさい | せっきょうくさい | preachy; sanctimonious | |
| 説明がつく | せつめいがつく | to explain adequately; to be accountable | |
| 説明が付く | せつめいがつく | to explain adequately; to be accountable | |
| 説明くさい | せつめいくさい | over-explanatory; overly expository; didactic; preachy | |
| 説明的科学 | せつめいてきかがく | explanatory science | |
| 貨幣国定説 | かへいこくていせつ | chartalism | |
| 貨幣数量説 | かへいすうりょうせつ | quantity theory of money | |
| 釈迦に説法 | しゃかにせっぽう | teaching your grandmother to suck eggs; teaching something to someone who knows more than you; preaching to the choir; lecturing to the Buddha | |
| 随伴現象説 | ずいはんげんしょうせつ | epiphenomenalism | |
| 風説の流布 | ふうせつのるふ | spread of rumours (esp. to influence stock prices); spread of rumors | |
| ケイタイ小説 | けいたいしょうせつ | cell phone novel; literary work originally written on a cellular phone | |
| ケータイ小説 | けいたいしょうせつ | cell phone novel; literary work originally written on a cellular phone | |
| ゴシック小説 | ゴシックしょうせつ | gothic novel | |
| ゼノンの逆説 | ゼノンのぎゃくせつ | Zeno's paradoxes | |
| ミステリ小説 | ミステリーしょうせつ | mystery novel | |
| ワイスマン説 | ワイスマンせつ | Weismannism | |
| 一般教書演説 | いっぱんきょうしょえんぜつ | State of the Union address (US) | |
| 仮説を立てる | かせつをたてる | to build up a hypothesis | |
| 勧善懲悪小説 | かんぜんちょうあくしょうせつ | (Edo-period) didactic novel or fiction | |
| 化学浸透圧説 | かがくしんとうあつせつ | chemiosmotic hypothesis | |
| 取り扱説明書 | とりあつかいせつめいしょ | user's manual; instruction manual; operation manual | |
| 取扱い説明書 | とりあつかいせつめいしょ | user's manual; instruction manual; operation manual | |
| 宇宙検閲仮説 | うちゅうけんえつかせつ | cosmic censorship hypothesis; cosmic censorship conjecture | |
| 恒常所得仮説 | こうじょうしょとくかせつ | permanent income hypothesis | |
| 所信表明演説 | しょしんひょうめいえんぜつ | general policy speech; speech held by the Prime Minister of Japan at the start of a special or extraordinary Diet session | |
| 指名受諾演説 | しめいじゅだくえんぜつ | acceptance speech | |
| 施政方針演説 | しせいほうしんえんぜつ | policy speech | |
| 演繹的説明法 | えんえきてきせつめいほう | deductive method | |
| 空想科学小説 | くうそうかがくしょうせつ | science fiction; sci-fi; fantasy fiction | |
| 説き聞かせる | とききかせる | to explain; to reason | |
| 説明的妥当性 | せつめいてきだとうせい | explanatory adequacy | |
| 購買力平価説 | こうばいりょくへいかせつ | purchasing power parity theory; PPP theory | |
| 赤の女王仮説 | あかのじょおうかせつ | Red Queen hypothesis (of evolutionary biology) | |
| アーサー王伝説 | アーサーおうでんせつ | Arthurian legend; legend of King Arthur | |
| エルゴード仮説 | エルゴードかせつ | ergodic hypothesis | |
| クローン選択説 | クローンせんたくせつ | clonal selection theory | |
| ピカレスク小説 | ピカレスクしょうせつ | picaresque novel | |
| フロギストン説 | フロギストンせつ | phlogiston theory | |
| ミステリー小説 | ミステリーしょうせつ | mystery novel | |
| ルイセンコ学説 | ルイセンコがくせつ | Lysenkoism | |
| 不可説不可説転 | ふかせつふかせつてん | 10^37218383881977644441306597687849648128; 10^(7x2^122) | |
| 取り扱い説明書 | とりあつかいせつめいしょ | user's manual; instruction manual; operation manual | |
| 合理的期待仮説 | ごうりてききたいかせつ | rational expectations hypothesis | |
| 宇宙検閲官仮説 | うちゅうけんえつかんかせつ | cosmic censorship hypothesis; cosmic censorship conjecture | |
| 小説家になろう | しょうせつかになろう | Shōsetsuka ni Narō (novel self-publishing website) | |
| 解説真正貸付法 | かいせつしんせいかしつけほう | truth in lending act | |
| パンスペルミア説 | パンスペルミアせつ | panspermia hypothesis | |
| 人を見て法を説く | ひとをみてほうをとく | to suit one's speech to the audience | |
| 人を見て法を説け | ひとをみてほうをとけ | suit your speech to the audience | |
| 我は仮説を作らず | われはかせつをつくらず | I feign no hypotheses; hypotheses non fingo | |
| 推理小説作家協会 | すいりしょうせつさっかきょうかい | Crime Writers' Association | |
| 百日の説法屁一つ | ひゃくにちのせっぽうへひとつ | single mistake which ruins all one's hard work; one blunder rendering a long period of effort useless; one fart in a hundred days of sermons | |
| アフリカ単一起源説 | アフリカたんいつきげんせつ | Out-of-Africa theory (positing a recent African origin for modern humans) | |
| プランクの量子仮説 | プランクのりょうしかせつ | Planck's quantum hypothesis | |
| 事実は小説より奇也 | じじつはしょうせつよりきなり | truth is stranger than fiction | |
| 合理的期待形成仮説 | ごうりてききたいけいせいかせつ | rational expectations hypothesis | |
| 我は仮説をつくらず | われはかせつをつくらず | I feign no hypotheses; hypotheses non fingo | |
| われは仮説をつくらず | われはかせつをつくらず | I feign no hypotheses; hypotheses non fingo | |
| サピアウォーフの仮説 | サピアウォーフのかせつ | Sapir-Whorf hypothesis | |
| プログラム保守説明書 | プログラムほしゅせつめいしょ | program maintenance manual | |
| 事実は小説より奇なり | じじつはしょうせつよりきなり | truth is stranger than fiction | |
| 2012年人類滅亡説 | にせんじゅうにねんじんるいめつぼうせつ | 2012 human extinction beliefs; 2012 doomsday theory | |
| カントラプラスの星雲説 | カントラプラスのせいうんせつ | Kant-Laplace nebular hypothesis | |
| サピア・ウォーフの仮説 | サピアウォーフのかせつ | Sapir-Whorf hypothesis | |
| サピア=ウォーフの仮説 | サピアウォーフのかせつ | Sapir-Whorf hypothesis | |
| 事実は小説よりも奇なり | じじつはしょうせつよりもきなり | truth is stranger than fiction | |