Revision
Amendment, Alteration
noun, verbal noun, の adjective
かいせい
校閲 (こうえつ) Revision, Proofreading
改正 (かいせい) Revision, Amendment, Alteration
訂正 (ていせい) Correction, Revision
矯正 (きょうせい) Correction, Remedy
正解 (せいかい) Correct Answer, Correct
改善 (かいぜん) Improvement, Betterment
甲斐性 (かいしょう) Resourcefulness, Competence
He added more kayaks かい and sabers せい to his latest Revision.
The kai かい (god from DBZ) says せい a Revision is necessary.