原作|げんさくgensaku[0]heiban (flat)

1. no-adjectiveoriginal work
   そのドラマは原作げんさくと違ちがっている。↗

   The drama differs from the original story.

• Antonym翻案ほんあんWritten翻案（ほんあん） is the literary word for an adaptation — a story recast from another work, not the 原作 itself. Use it for the reworked version, e.g. a play based on a novel.

Use 原作（げんさく） for the original work an adaptation is based on; choose 翻案（ほんあん） for the adapted version itself — a literary-register term that presupposes its source.

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

1. 翻訳ほんやく・脚色きゃくしょく・改作かいさく・訂正ていせいなどをする前まえのもとの作品さくひん。