改変|かいへんkaihen[0]heiban (flat)

1. noun, suru verb, transitive verbchange; alteration; modification

• Synonym変更へんこうNeutralThe everyday, most common word for a change (「予定変更」「設定変更」). 「改変」 alters content so it differs from the original, said mainly of works and data.
• Synonym改めるあらためるNeutralA verb for changing or correcting something, often with the nuance of improving it (「規則を改める」). 「改変」 only says the content was made different from the original.
• Synonym改定かいていWrittenFormal: newly setting or revising rules, fees, and the like (「料金改定」). 「改変」 is altering the content of works or data so it differs from the original.
• Synonym変えるかえるNeutralThe most general verb for changing—state, position, or time can all be changed. 「改変」 is a noun used specifically for altering content.
• Synonym改造かいぞうNeutralRemodeling machines, buildings, or organizations (「車を改造する」). 「改変」 is said of content and text rather than of how a thing or body is built.
• Synonym更改こうかいWrittenFormal: renewing by change; in law, altering the content of an obligation (「契約の更改」). 「改変」 is the general word for altering content.
• Synonym変化へんかNeutralAn intransitive word for shape or state changing (「気温の変化」). 「改変」 is an active change imposed on content.
• Related改正かいせいWrittenFormal: revising flaws in laws and rules (「法改正」), with the nuance of making them better. 「改変」 is neutral as to good or bad and takes content as its object.
• Related入れ替えるいれかえるNeutralA verb for swapping something out or switching order and roles (「選手を入れ替える」). 「改変」 alters the content itself rather than replacing it.
• Related切り替えるきりかえるNeutralA verb for switching from one mode or way of doing things to another (「モードを切り替える」). 「改変」 modifies content; it is not about switching.
• Related刷新さっしんWrittenFormal: sweeping out abuses to renew something completely (「人事刷新」), viewed positively. 「改変」 makes no judgement of good or bad, only that content differs.
• RelatedかいぜんNeutralImproving bad points for the better (「待遇改善」); the focus is on improvement. 「改変」 only says content was made different, with no judgement of good or bad.
• Related修正しゅうせいNeutralCorrecting errors or shortcomings and adjusting deviations; the aim is to set things right. 「改変」 makes content different from the original.
• Related変形へんけいNeutralA change in shape or state (「熱で変形する」); also a term in copyright law. 「改変」 concerns content, not outward form.
• Related手直してなおしNeutralSmall-scale touch-ups to something nearly finished. 「改変」 changes content so it differs from the original.
• Related修整しゅうせいWrittenFormal: retouching photographs, or generally fixing what is off; the aim is to make it right. 「改変」 alters content without that aim of repair.
• Related直すなおすNeutralA common everyday verb for repairing things or correcting mistakes, also for converting or translating. 「改変」 is a noun for altering content.
• Related改革かいかくWrittenFormal: large-scale reform of organizations or systems to make them better (「税制改革」). 「改変」 is neutral about good or bad and said mostly of content.
• Related調整ちょうせいNeutralAdjusting or coordinating to a standard or balance (「日程調整」). 「改変」 changes content so it differs, not to bring it into line.
• Related改良かいりょうNeutralImproving something by removing its faults (「品種改良」), with a positive nuance. 「改変」 only says content differs from the original, good or bad.
• Related変革へんかくWrittenFormal: changing systems or society at the root; can also be intransitive. 「改変」 is a deliberate change to content, not necessarily large-scale.
• Related変造へんぞうWrittenFormal: remaking existing things, often illegally falsifying currency or documents (「変造紙幣」). 「改変」 is not necessarily illegal.
• Related再編成さいへんせいWrittenFormal: reorganizing bodies, teams, and the like; its object is organizational structure. 「改変」 takes works, data, and other content as its object.
• Relatedすげ替えるすげかえるNeutralA verb for replacing old with new, often said of ousting personnel (「首をすげ替える」). 「改変」 alters the content itself.
• Antonym維持いじNeutralAntonym: keeping the existing level unchanged (「現状維持」), the opposite of altering content.
• Antonym保存ほぞんNeutralAntonym: preserving things as they are (「原状保存」), also saving data; opposed to 「改変」 in keeping things unchanged.

Use 「改変」 when works, data, or other content is altered so it differs from the original (「原作の改変」). For ordinary changes say 「変更」; for changes for the better, 「改善」 or 「改良」; for illegal falsification, 「変造」. The verbs 「変える」 and 「改める」 cover general changing, 「修正」「調整」「手直し」 are about fixing or fine-tuning, 「改造」 remodels machines, buildings or organizations, and 「改革」「変革」「刷新」 are reforms of systems. The antonyms 「維持」 and 「保存」 mean keeping things as they are.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 内容ないようを改あらためて元もととは違ちがったものにすること。