再 — “again / re-” in Japanese

Grade 5さい, ふたた

Radical ⼌ · radical 13 The building block this kanji is filed under

“again / re-” in Japanese is 再, read sai, futata (さい, ふたた). It is a Grade 5 Kyōiku kanji, taught in year 5 of Japanese elementary school, and appears in words such as 再生 (regeneration).

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What does 再 mean?

Full details, readings & example

Kanji	再
Meaning	again / re-
Readings	さい, ふたた
Grade	Grade 5 (Hard)
Curriculum	Kyōiku kanji · Japanese elementary school
Example	再生 (regeneration)

How to read 再

再 is read sai (さい) or futata (ふたた) depending on the word.

Words with 再

再建さいけん
再会さいかい
再利用さいりよう
再生

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Kanji read the same way as 再

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Updated: 2026-08-28