| Subject | English | Japanese |
| gen. | n a wise idea | 賢慮 |
| gen. | n abstract idea | 抽象概念 |
| gen. | n obsc acquired idea | 習得観念 (as opposed to innate) |
| gen. | n obsc acquired ideas | 習得観念 |
| gen. | n adj-no yoji acting according to one's own ideas and beliefs | 独立独行 |
| gen. | adopt ideas | 汲上げる (from subordinates, the public, etc.) |
| gen. | adopt ideas | くみ上げる (from subordinates, the public, etc.) |
| gen. | adopt ideas | 汲み上げる (from subordinates, the public, etc.) |
| gen. | n yoji an idea that isn't worth the paper it's written on | 机上空論 |
| gen. | n ancient ideas | 旧説 |
| gen. | n another idea | 余念 news1 nf21 |
| gen. | adj-na n bad idea | 不了見 |
| gen. | adj-na n bad idea | 不量見 |
| gen. | adj-na n bad idea | 不料簡 |
| gen. | n adj-no yoji being free from all ideas and thoughts | 無想無念 |
| gen. | n bouncing of ideas, opinions, etc. off each other to obtain a fine-tuned integrated whole | 摺り合わせ |
| gen. | n bouncing of ideas, opinions, etc. off each other to obtain a fine-tuned integrated whole | 擦り合せ |
| gen. | n bouncing of ideas, opinions, etc. off each other to obtain a fine-tuned integrated whole | すり合せ (suriawase) |
| gen. | n bouncing of ideas, opinions, etc. off each other to obtain a fine-tuned integrated whole | 擦り合わせ |
| gen. | n bouncing of ideas, opinions, etc. off each other to obtain a fine-tuned integrated whole | 摺り合せ |
| gen. | n bouncing of ideas, opinions, etc. off each other to obtain a fine-tuned integrated whole | すり合わせ |
| gen. | n bright idea | 妙案 news2 nf30 spec2 |
| gen. | n central idea | 中心思想 |
| gen. | n vs coming up with an idea | 落想 |
| gen. | n common idea | 通念 news1 nf18 |
| gen. | exp n conventional ideas | 捕らわれた考え |
| gen. | exp n conventional ideas | とらわれた考え |
| gen. | exp n conventional ideas | 囚われた考え |
| rel., budd. | n conviction based on flawed ideas | 妄念 |
| gen. | n yoji developing new ideas based on study of the past | 温古知新 |
| gen. | n yoji developing new ideas based on study of the past | 温故知新 |
| gen. | exp yoji Even a fool may sometimes come up with a good idea | 千慮一得 |
| inf. | n yoji everyone has his own ideas and tastes | 十人十色 news2 nf44 |
| gen. | exp yoji Everyone has his own ideas and tastes | 千人千色 |
| inf. | n yoji everyone has his own interests and ideas | 十人十色 news2 nf44 |
| gen. | n excellent idea | 卓識 |
| gen. | n excellent idea | 銘説 |
| gen. | n excellent idea | 名説 |
| gen. | n excellent idea | 卓見 |
| gen. | n excellent idea | 高見 |
| gen. | n exchange of ideas | 意見交換 (いけんこうかん) |
| gen. | n vs explaining an idea | 説述 |
| gen. | n vs expression of thoughts, ideas, etc. | 言述 |
| gen. | fail to come up with a good idea | 考えあぐねる |
| gen. | fail to come up with a good idea | 考え倦ねる |
| gen. | n fantastic idea | 奇想 |
| gen. | adj-na n adj-no yoji fantastic idea | 奇想天外 news2 nf26 |
| gen. | n obsc yoji fixed idea | 固着観念 |
| gen. | n adj-no yoji fixed idea | 固定観念 news2 nf29 |
| gen. | n vs foolish idea | 愚考 |
| gen. | n fundamental idea | 基本原理 (きほんげんり) |
| gen. | n general idea | 一般概念 |
| gen. | n general idea | 概念 ichi1 news1 nf07 (がいねん) |
| gen. | n general idea | コンセプト gai1 |
| gen. | n generally accepted idea | 通念 news1 nf18 |
| gen. | get an idea | 目星がつく |
| gen. | get an idea | 目星が付く |
| gen. | get the idea of doing | 思い立つ news2 nf44 |
| gen. | get wrong ideas by letting imagination run wild | 気を回す |
| gen. | give an idea to | 教え込む news2 nf44 |
| gen. | n good idea | 良案 |
| gen. | n good idea | 妙計 |
| gen. | n good idea | 名案 ichi1 news2 nf36 |
| gen. | n good idea | 上分別 |
| gen. | n good idea | グッド・アイディア |
| gen. | n good idea | グッドアイディア |
| gen. | adj-na n grand in one's idea or mind-set | 気宇広濶 |
| gen. | adj-na n grand in one's idea or mind-set | 気宇広闊 |
| gen. | n adj-na yoji grand in one's idea or mind-set | 気宇壮大 |
| gen. | n yoji half-baked foolish, ill-advised idea | 鼻先思案 |
| gen. | n yoji half-baked foolish, ill-advised idea | 鼻先分別 |
| gen. | n yoji half-baked foolish, ill-advised idea | 喉元思案 |
| gen. | n yoji half-baked foolish, ill-advised idea | 鼻元思案 |
| gen. | have a idea | 見当が付く (of what the situation is) |
| inf. | have a idea | 見当つく (of what the situation is) |
| inf. | have a idea | 見当付く (of what the situation is) |
| gen. | have a idea | 見当がつく (of what the situation is) |
| gen. | have a lively exchange of ideas | ぶつけ合う |
| gen. | have a rough idea of what the situation is | 目処が付く |
| gen. | have a rough idea of what the situation is | 目処がつく |
| gen. | have an idea | 心当たりが有る |
| gen. | have an idea | 心当たりがある |
| gen. | have the wrong idea | 思いちがい |
| gen. | have the wrong idea | 思い違い news2 nf31 (おもいちがい) |
| gen. | exp having no idea | つゆ知らず |
| gen. | exp having no idea | 心当たりが無い |
| gen. | exp having no idea | 心当たりがない |
| gen. | exp having no idea | 露知らず |
| gen. | exp having no idea of | さっぱり分かりません |
| gen. | exp adj-i having no idea of | さっぱり分らない |
| gen. | exp having not the slightest idea | 見当もつかない |
| gen. | exp having not the slightest idea | 見当が付かない |
| gen. | exp having not the slightest idea | 見当がつかない |
| gen. | hit on a good idea | 閃く ichi1 |
| titles | Icon and Idea | イコンとイデア (book) |
| gen. | n idea about politics | 政治思想 |
| gen. | n vs idea borne in mind | 懐抱 |
| gen. | n idea commonly generally accepted in the world | 社会通念 |
| tech. | idea-finding | 発想法 (はっそうほう) |
| gen. | n idea man | アイデアマン |
| gen. | n idea man | アイディア・マン |
| gen. | n idea man | アイデア・マン |
| gen. | n idea man | アイディアマン |
| gen. | n idea of being part of a chosen people | 選民思想 |
| gen. | n late Edo-period idea of uniting the court and the shogunate | 公武合体論 |
| comp. | n idea processor | アイデア・プロセッサ |
| comp. | n idea processor | アイデアプロセッサ |
| rel., budd. | exp idea that all things in the universe lack their own unchangeable substances | 諸法無我 |
| gen. | n ideas brought forth at the conclusion of a week | 週案 |
| gen. | n ideas man | アイデアマン |
| gen. | n ideas man | アイデア・マン |
| gen. | n ideas man | アイディア・マン |
| gen. | n ideas man | アイディアマン |
| gen. | ideas, products, services, etc. proposed by a company to consumers | シーズ |
| proverb | exp Inadequate ideas are worse than none at all | 下手の考え休むに似たり |
| proverb | exp Inadequate ideas are worse than none at all | 下手な考え休むに似たり |
| humor. | n incomprehensible idea | 迷説 pun on 名説 |
| gen. | n ingenious idea | 妙案 news2 nf30 spec2 |
| gen. | n obsc innate idea | 本有観念 |
| gen. | n innate idea | 生得観念 |
| gen. | n obsc innate ideas | 本有観念 |
| gen. | n innate ideas | 生得観念 |
| gen. | insist on own ideas | 我を立てる |
| gen. | insist on own ideas | 我を張る |
| gen. | insist on own ideas | 我を通す |
| gen. | insist on own ideas | 我を出す |
| gen. | int fem interjection used to impress an idea or to urge a response | 良い事 |
| gen. | int fem interjection used to impress an idea or to urge a response | 好い事 |
| gen. | int fem interjection used to impress an idea or to urge a response | 好いこと |
| gen. | int fem uk interjection used to impress an idea or to urge a response | いい事 |
| gen. | int fem interjection used to impress an idea or to urge a response | 良いこと |
| gen. | n main idea | 大旨 |
| gen. | n main idea | 概ね |
| gen. | make someone give up the idea of | 思い切らせる |
| gen. | n mistaken idea | 考え違い |
| gen. | n new idea or design | 新案 |
| gen. | n new ideas | 新知識 |
| gen. | n novel idea | 椿説 |
| gen. | n novel idea | 珍説 |
| gen. | n odd idea | 珍案 |
| gen. | n old-fashioned idea | 旧思想 |
| gen. | exp one case gives you an idea of what always happens | 一事が万事 |
| gen. | n yoji one who is obsessed with the idea of taking over government | 政権亡者 |
| gen. | n original idea | 創意 news1 nf18 (そうい) |
| gen. | n vs original idea | 創案 |
| gen. | n hum one's own idea | 卑懐 |
| gen. | n hum one's own idea | 鄙懐 |
| gen. | one's own idea | 主観 ichi1 news2 nf28 |
| gen. | n person of ideas | アイディア・マン |
| gen. | n person of ideas | アイデア・マン |
| gen. | n person of ideas | アイデアマン |
| gen. | n person of ideas | アイディアマン |
| gen. | n philosophical idea that nothing outside of one's own mind really exists | 独我論 |
| gen. | n play dealing with ideas | 思想劇 |
| gen. | n political idea | 政治思想 |
| gen. | n yoji preconceived idea | 既成概念 news2 nf37 |
| gen. | present competing ideas | ぶつけ合う |
| gen. | n process of forming and relating ideas | 観念化 |
| gen. | push through an unreasonable idea | 横車を押す |
| gen. | put ideas in order | 考えを纏める |
| gen. | put ideas in order | 考えをまとめる |
| gen. | n reactionary ideas | 反動思想 |
| gen. | n ready-made ideas | 既成観念 |
| gen. | n resistant idea | 勁草 (metaphorically) |
| gen. | n same idea | 同案 |
| humor. | n seemingly good but ultimately stupid idea | 迷案 pun on 名案 |
| gen. | n superficial idea | 淺見 |
| gen. | n superficial idea | 浅見 news2 nf27 spec2 |
| gen. | that idea | 同案 |
| gen. | n the idea that divers always dive with a buddy to assist each other | バディ・システム |
| gen. | n the idea that divers always dive with a buddy to assist each other | バディシステム |
| proverb | exp They to whom only bad ideas come might as well be asleep | 下手の考え休むに似たり |
| proverb | exp They to whom only bad ideas come might as well be asleep | 下手な考え休むに似たり |
| gen. | v5k to be struck with an idea | 思いつく news2 nf41 |
| gen. | v5k to be struck with an idea | 思い付く ichi1 |
| gen. | n two ideas | 二念 |
| gen. | n adj-no yoji unreasonable but compulsive idea | 強迫観念 news2 nf39 |
| gen. | n unusual idea | 珍案 |
| gen. | n yoji unworkable idea | 机上空論 |
| gen. | n weekly ideas | 週案 |
| gen. | n widespread exchange of animals, plants, culture, disease, and ideas between the Old and New Worlds | コロンブス交換 |
| gen. | n vs wild idea | 盲想 |
| gen. | n vs wild idea | 妄想 news2 nf27 spec2 |
| gen. | n world of ideas | 思想界 |
| gen. | n wrong idea | 了簡違い |
| gen. | n wrong idea | 料簡違い |
| gen. | n wrong idea | 了見違い |
| gen. | n your idea | 尊慮 |
| gen. | n hon your idea | 高察 |
| gen. | n your idea | 尊意 |