| 再び | ふたたび | again; once more; a second time | n2 |
| 再生 | さいせい | restoration to life; coming to life again; resuscitation; regeneration | n3 |
| 再現 | さいげん | reappearance; reemergence; return; revival | n1 |
| 再度 | さいど | a second time; again; once more; twice | n2 |
| 再会 | さいかい | meeting again; reunion | n2 |
| 再三 | さいさん | again and again; repeatedly | n2 |
| 再 | さい | re-; again | n3 |
| 再建 | さいけん | rebuilding; reconstruction; rehabilitation; protoform reconstruction | |
| 再興 | さいこう | revival; restoration; resuscitation | n4 |
| 再開 | さいかい | reopening; resumption; restarting | n2 |
| 再発 | さいはつ | return; relapse; recurrence | n2 |
| 再開発 | さいかいはつ | redevelopment | |
| 再婚 | さいこん | second marriage; remarriage | |
| 再來 | さいらい | return; coming back; second coming (e.g. of Christ); second advent | |
| 再来 | さいらい | return; coming back; second coming (e.g. of Christ); second advent | |
| 再起 | さいき | comeback; recovery; restoration; rally | |
| 再版 | さいはん | reprint; reprinting; second edition | |
| 再エネ | さいエネ | renewable energy; green energy | |
| 一再 | いっさい | once or twice; repeatedly | n2 |
| 再縁 | さいえん | second marriage | |
| 再々 | さいさい | often; frequently; again and again | |
| 再編 | さいへん | reorganization; reorganisation; reshuffle | n1 |
| 再燃 | さいねん | recurrence; revival; resuscitation | |
| 再考 | さいこう | reconsideration | n1 |
| 再読 | さいどく | rereading; reading again; reading a single kanji twice (with different pronunciations) in kanbun | n1 |
| 再拝 | さいはい | bowing twice; worshipping again; yours sincerely; sincerely yours | |
| 再構築 | さいこうちく | reconstruction; rebuilding; restructuring | |
| 再演 | さいえん | another showing (of a play); playing the same role again (i.e. of an actor); recapitulation | |
| 再挙 | さいきょ | another attempt; another try; second attempt | |
| 再利用 | さいりよう | reuse; recycling | |
| 再放送 | さいほうそう | rebroadcasting; rerun | |
| 再現性 | さいげんせい | reproducibility; repeatability; duplicability | |
| 再三再四 | さいさんさいし | repeatedly | |
| 再刊 | さいかん | reissue (of a discontinued magazine, etc.); republication; reprint; resumption of publication | |
| 再生数 | さいせいすう | view count (of a video); number of views | |
| 再評価 | さいひょうか | reassessment; reappraisal; reevaluation; revaluation | |
| 再転 | さいてん | changing directions; turning around | |
| 再来年 | さらいねん | year after next | n2 |
| 再嫁 | さいか | remarriage (of a woman) | |
| 再構成 | さいこうせい | reconstruction; reorganization; reorganisation; reconstitution | |
| 再発見 | さいはっけん | rediscovery | |
| 再確認 | さいかくにん | reaffirmation; reconfirmation; revalidation | |
| 再生産 | さいせいさん | reproduction | |
| 再発行 | さいはっこう | reissue (of a book, bond, passport, etc.); republication | |
| 再選 | さいせん | re-election; reelection | n1 |
| 再築 | さいちく | reconstruction; rebuilding | |
| 再販 | さいはん | resale | |
| 再投資 | さいとうし | reinvestment | |
| 再認識 | さいにんしき | recognizing anew; seeing something in a new light | |
| 再任 | さいにん | reappointment | |
| 再定義 | さいていぎ | redefinition; redefining | |
| 再検討 | さいけんとう | re-examination; review; reconsideration; reappraisal | n2 |
| 再審 | さいしん | retrial; reopening of a case; review; reexamination | n3 |
| 再犯 | さいはん | second offense; second offence; reoffending; recidivism | |
| 再説 | さいせつ | repeated explanation | |
| 再就職 | さいしゅうしょく | reemployment | |
| 再配布 | さいはいふ | redistribution (of software) | |
| 再製 | さいせい | remanufacture; reconditioning | n3 |
| 再帰 | さいき | returning again; recurrence; recursion; reflexivity | |
| 再臨 | さいりん | second coming; second advent | |
| 再思 | さいし | reconsideration | |
| 再読み込み | さいよみこみ | reloading (a file, web page, etc.) | |
| 再戦 | さいせん | rematch | n1 |
| 再訪 | さいほう | revisiting; visiting again | |
| 再認 | さいにん | recognizing again; reacknowledging; recognition | |
| 再審査 | さいしんさ | re-examination | |
| 再スタート | さいスタート | restart | |
| 再出発 | さいしゅっぱつ | restart; fresh start | |
| 再挑戦 | さいちょうせん | retry; another try; another go | |
| 再編成 | さいへんせい | reorganization; reorganisation; reshuffle | |
| 再試合 | さいしあい | rematch; replay; make-up game | |
| 再録 | さいろく | reprinting; rerecording | |
| 再教育 | さいきょういく | re-education; retraining; in-service training | |
| 再注目 | さいちゅうもく | being in the center of attention again; coming back into the limelight | |
| 再設定 | さいせってい | reestablish; reset (a password) | |
| 再起動 | さいきどう | restart; reboot | |
| 再診 | さいしん | re-examination; follow-up examination | n3 |
| 再論 | さいろん | rediscussion; debating anew | |
| 再交付 | さいこうふ | reissue; regrant | |
| 再加工 | さいかこう | reprocessing | |
| 再整理 | さいせいり | rearrangement; reorganization; recounting (an event) | |
| 再配置 | さいはいち | rearrangement; reallocation; realignment; relocation | |
| 再雇用 | さいこよう | reemployment | |
| 再訂 | さいてい | second revision; revised edition | n3 |
| 再結成 | さいけっせい | reforming; reuniting; getting back together (of a band, etc.) | |
| 再調整 | さいちょうせい | readjustment; realignment | |
| 再調査 | さいちょうさ | reexamination; reinvestigation; resurvey | |
| 再配分 | さいはいぶん | redistribution | |
| 組織再編 | そしきさいへん | reorganization; reorganisation; restructuring | |
| 再生可能エネルギー | さいせいかのうエネルギー | renewable energy | |
| 再検 | さいけん | re-examination; reinspection; reappraisal; review | |
| 再話 | さいわ | retelling (of a tale, legend, etc.) | |
| 再上映 | さいじょうえい | rescreening (of a movie); reshowing; rerun; repeat | |
| 再始動 | さいしどう | restarting (a machine, engine, project, etc.); resuming | |
| 再導入 | さいどうにゅう | reintroduction | |
| 再帰的 | さいきてき | recursive; reflexive | |
| 再投稿 | さいとうこう | repost (e.g. of an online article); resubmission; revised submission | |
| 再注文 | さいちゅうもん | repeat order; reorder | |
| 再生法 | さいせいほう | regeneration process; rehabilitation method; recovery | |
| 再販売 | さいはんばい | resale | |