改善 – Used in

Verb (する, transitive)

1. betterment; improvement

Usually written in kana

2. kaizen (Japanese business philosophy of continuous improvement)

oft. written カイゼン

	Used in	Used in %
Anime	123	(8%)
Live action	210	(16%)
Visual novels	281	(52%)
Novels	863	(44%)
Non-fiction	64	(44%)
Web novels	496	(47%)
Aozora Bunko	87	(15%)

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Visual novel

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Book (non-fiction)

Used times	16

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Visual novel

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Visual novel

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Aozora Bunko

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Visual novel

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Meanings

Used in

The Irregular at Magic High School

転生王女と天才令嬢の魔法革命【Web版】

転生したらスライムだった件

幻想再帰のアリュージョニスト

Netoge no Yome wa Onnanoko ja Nai to Omotta?

Silverio Vendetta

Ameku Takao no Suiri Karute

アラフォー賢者の異世界生活日記

Haretsu

Nejimaki Seirei Senki: Tenkyou no Alderamin

Eromanga Sensei

八男って、それはないでしょう！

Baldur's Gate: Enhanced Edition

Ouroboros Record

Souzou Renkinjutsushi wa Jiyuu wo Ouka suru: Kokyou wo Tsuihou saretara, Maou no Ohizamoto de Chouzetsu Kouka no Magic Item Tsukuri-houdai ni Narimashita

賢者の弟子を名乗る賢者

最強出涸らし皇子の暗躍帝位争い～帝位に興味ないですが、死ぬのは嫌なので弟を皇帝にしようと思います～

Rabukome no Kamisama Nanoni Ore no Rabukome wo Jama Suru no? Datte Suki Nanda Mon

Monobeno -Happy End-

Osananajimi ga Zettai ni Makenai Rabukome

Ryuusei World Actor

Tensei Oujo to Tensai Reijou no Mahou Kakumei

The Rising of the Shield Hero

Girly Air Force

Kenja no Deshi wo Nanoru Kenja

Ore wa Seikan Kokka no Akutoku Ryoushu!

私の推しは悪役令嬢。

Guin Saga

Watashi no Oshi wa Akuyaku Reijou

9S (Nine S)

Sasaki to Pii-chan

濁った瞳のリリアンヌ

Kenkou Shokuhin no Koto ga Yoku Wakaru Hon

Keisanki Program no Kouzou to Kaishaku Dainihan

Isekai Ryouridou

Toaru Ossan no VRMMO Katsudouki

Only Sense Online

Daitoshokan no Hitsujikai

Chrome Shelled Regios

Onii-chan dakedo Ai sae Areba Kankei Nai yo ne!

Yahari Ore no Seishun Love Come wa Machigatteiru

World End Economica

聖者無双 ～サラリーマン、異世界で生き残るために歩む道～

Maitetsu

森の生活――ウォールデン―― 02 森の生活――ウォールデン――

Shinigamihime no Saikon

Tensei-saki ga Shoujo Manga no Shirobuta Reijou datta

Rewrite

闇の悪役令嬢は愛されすぎる

Bara no Maria

八男って、それはないでしょう！　

聖者無双　～サラリーマン、異世界で生き残るために歩む道～