| 忘れる | わすれる | to forget; to leave carelessly; to be forgetful of; to forget about | n5 |
| 忘却 | ぼうきゃく | lapse of memory; forgetting completely; (consigning to) oblivion | n1 |
| 置き忘れる | おきわすれる | to leave behind; to misplace; to forget | |
| 忘れ物 | わすれもの | lost article; thing left behind; leaving something behind; forgetting something | n4 |
| 忘れ去る | わすれさる | to forget completely; to leave behind | |
| 忘れかける | わすれかける | to start forgetting | |
| 忘恩 | ぼうおん | ingratitude; thanklessness | |
| 物忘れ | ものわすれ | forgetfulness | |
| 忘る | わする | to lose something | |
| 忘れもの | わすれもの | lost article; thing left behind; leaving something behind; forgetting something | n4 |
| 忘我 | ぼうが | trance; ecstasy; enthusiasm | |
| 忘年会 | ぼうねんかい | year-end party; "forget-the-year" party; bōnenkai | |
| 忘れっぽい | わすれっぽい | forgetful | |
| 備忘録 | びぼうろく | notebook; memorandum; commonplace book | |
| 忘れ形見 | わすれがたみ | memento (from a dead person); souvenir; keepsake; orphan | |
| 健忘 | けんぼう | forgetfulness; amnesia | |
| 胴忘れ | どうわすれ | lapse of memory; forgetting for a moment something one knows well; (something) slipping one's mind | |
| 健忘症 | けんぼうしょう | amnesia; loss of memory | |
| 置忘れる | おきわすれる | to leave behind; to misplace; to forget | |
| 忘失 | ぼうしつ | forgetting; losing | |
| 度忘れ | どわすれ | lapse of memory; (something) slipping one's mind; forgetting for a moment something one knows well | |
| 忘れな草 | わすれなぐさ | forget-me-not (esp. the water forget-me-not, Myosotis scorpioides) | |
| 入れ忘れる | いれわすれる | to forget to put in; to leave out | |
| 備忘 | びぼう | reminder | |
| 年忘れ | としわすれ | forgetting the hardships of the old year; year-end drinking party | |
| 忘れ草 | わすれぐさ | orange daylily (Hemerocallis fulva); tawny daylily; tobacco | |
| 忘年 | ぼうねん | forgetting the hardships of the old year; forgetting one another's age difference | |
| 勿忘草 | わすれなぐさ | forget-me-not (esp. the water forget-me-not, Myosotis scorpioides) | |
| 両忘 | りょうぼう | detachment from dichotomies; detachment from objectivity and subjectivity | |
| 寝忘れる | ねわすれる | to oversleep | |
| 都忘れ | みやこわすれ | Miyamayomena savatieri (species of flowering plant) | |
| 面忘れ | おもわすれ | failure to recognize someone; failure to recognise someone | |
| 忘れもん | わすれもの | lost article; thing left behind; leaving something behind; forgetting something | n4 |
| 忘八 | ぼうはち | customer at a brothel; john; someone who has forgotten the eight virtues; brothel | |
| 忘緒 | わすれお | decorative gauze strap that hangs from the front left side of the kohimo when tying closed one's hanpi | |
| 忘草 | わすれぐさ | orange daylily (Hemerocallis fulva); tawny daylily; tobacco | |
| 物忘 | ものわすれ | forgetfulness | |
| 胴忘 | どうわすれ | lapse of memory; forgetting for a moment something one knows well; (something) slipping one's mind | |
| ど忘れ | どわすれ | lapse of memory; (something) slipping one's mind; forgetting for a moment something one knows well | |
| ド忘れ | どわすれ | lapse of memory; (something) slipping one's mind; forgetting for a moment something one knows well | |
| 忘れ扇 | わすれおうぎ | discarded fan (in autumn); forgotten fan | |
| 忘れ緒 | わすれお | decorative gauze strap that hangs from the front left side of the kohimo when tying closed one's hanpi | |
| 忘れ花 | わすればな | late bloomer; flower blooming after its usual season (esp. in winter) | |
| 忘れ霜 | わすれじも | late frost; frost in late spring | |
| 忘れ鼻 | わすればな | unobtrusive nose; unpeculiar nose | |
| 忘八屋 | くつわや | brothel | |
| どう忘れ | どうわすれ | lapse of memory; forgetting for a moment something one knows well; (something) slipping one's mind | |
| 備忘価額 | びぼうかがく | residual value; scrap value; memorandum price; memorandum value | |
| 勿忘草色 | わすれなぐさいろ | forget-me-not blue | |
| 忘るな草 | わするなぐさ | forget-me-not | |
| 忘れえぬ | わすれえぬ | unforgettable | |
| 忘れがち | わすれがち | forgetful; oblivious of; negligent | |
| 忘れん坊 | わすれんぼう | forgetful person | |
| 忘れ勝ち | わすれがち | forgetful; oblivious of; negligent | |
| 忘れ得ぬ | わすれえぬ | unforgettable | |
| 忘れ難い | わすれがたい | unforgettable; memorable | |
| 忘却曲線 | ぼうきゃくきょくせん | forgetting curve | |
| 忘己利他 | もうこりた | selflessness; selfless devotion to the service of others | |
| 忘恩行為 | ぼうおんこうい | act of ingratitude | |
| 忘新年会 | ぼうしんねんかい | year-end parties (held in December) and New Year parties (held in January) | |
| 流し忘れ | ながしわすれ | forgetting to flush (the toilet) | |
| 聞忘れる | ききわすれる | to forget to ask | |
| 見忘れる | みわすれる | to forget; to fail to recognize; to fail to recognise | |
| 言忘れる | いいわすれる | to forget to say; to forget to mention | |
| お忘れなく | おわすれなく | please don't forget; please remember; keep in mind | |
| きき忘れる | ききわすれる | to forget to ask | |
| 乖離性健忘 | かいりせいけんぼう | dissociative amnesia | |
| 前向性健忘 | ぜんこうせいけんぼう | anterograde amnesia | |
| 幼児期健忘 | ようじきけんぼう | childhood amnesia; infantile amnesia | |
| 忘れがたい | わすれがたい | unforgettable; memorable | |
| 忘れな草色 | わすれなぐさいろ | forget-me-not blue | |
| 忘却の彼方 | ぼうきゃくのかなた | dustbin of history; ash heap of history; obscurity; long-forgotten memory | |
| 恩を忘れる | おんをわすれる | to be ungrateful | |
| 我を忘れる | われをわすれる | to forget oneself; to lose control of oneself | |
| 聞き忘れる | ききわすれる | to forget to ask | |
| 解離性健忘 | かいりせいけんぼう | dissociative amnesia | |
| 言い忘れる | いいわすれる | to forget to say; to forget to mention | |
| 訊き忘れる | ききわすれる | to forget to ask | |
| 逆向性健忘 | ぎゃっこうせいけんぼう | retrograde amnesia | |
| われを忘れる | われをわすれる | to forget oneself; to lose control of oneself | |
| 前後を忘れる | ぜんごをわすれる | to lose one's common sense (e.g. in excitement or intoxication); to forget the situation one's in; to lose oneself (in something) | |
| 忘れもしない | わすれもしない | unforgettable; impossible to forget; lucidly remember | |
| 忘れられない | わすれられない | unforgettable; memorable; haunting; indelible | |
| 忘却のかなた | ぼうきゃくのかなた | dustbin of history; ash heap of history; obscurity; long-forgotten memory | |
| 故郷忘じ難し | こきょうぼうじがたし | there is no place like home; home is sweet to an exile | |
| 逆行性健忘症 | ぎゃっこうせいけんぼうしょう | retrograde amnesia | |
| 忘れられる権利 | わすれられるけんり | right to be forgotten; right to erasure | |
| 初心忘るべからず | しょしんわするべからず | we were all beginners once; never lose your humility; don't let success get to your head; don't forget where you came from | |
| 初心忘る可からず | しょしんわするべからず | we were all beginners once; never lose your humility; don't let success get to your head; don't forget where you came from | |
| 雀百迄踊り忘れず | すずめひゃくまでおどりわすれず | what is learned in the cradle is carried to the tomb | |
| 治にいて乱を忘れず | ちにいてらんをわすれず | forewarned is forearmed; in fair weather prepare for foul; don't forget war in time of peace | |
| 治に居て乱を忘れず | ちにいてらんをわすれず | forewarned is forearmed; in fair weather prepare for foul; don't forget war in time of peace | |
| 雀百まで踊り忘れず | すずめひゃくまでおどりわすれず | what is learned in the cradle is carried to the tomb | |
| 老いたる馬は路を忘れず | おいたるうまはみちをわすれず | trust the judgement of the experienced; an old horse won't forget the way | |
| 老いたる馬は道を忘れず | おいたるうまはみちをわすれず | trust the judgement of the experienced; an old horse won't forget the way | |
| 喉元すぎれば熱さを忘れる | のどもとすぎればあつさをわすれる | danger past and God forgotten; once on shore, we pray no more; once it's past the throat, one forgets the heat (of the swallowed object) | |
| 喉元過ぎれば熱さを忘れる | のどもとすぎればあつさをわすれる | danger past and God forgotten; once on shore, we pray no more; once it's past the throat, one forgets the heat (of the swallowed object) | |
| のど元過ぎれば熱さを忘れる | のどもとすぎればあつさをわすれる | danger past and God forgotten; once on shore, we pray no more; once it's past the throat, one forgets the heat (of the swallowed object) | |
| 天災は忘れた頃にやってくる | てんさいはわすれたころにやってくる | natural disasters happen when you've forgotten about the previous ones | |
| 天災は忘れたころにやってくる | てんさいはわすれたころにやってくる | natural disasters happen when you've forgotten about the previous ones | |