積 — “accumulate / pile up” in Japanese

Grade 4せき, つ

Radical ⽲ · radical 115 The building block this kanji is filed under

“accumulate / pile up” in Japanese is 積, read seki, tsu (せき, つ). It is a Grade 4 Kyōiku kanji, taught in year 4 of Japanese elementary school, and appears in words such as 積む (to pile up).

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What does 積 mean?

Full details, readings & example

Kanji	積
Meaning	accumulate / pile up
Readings	せき, つ
Grade	Grade 4 (Upper)
Curriculum	Kyōiku kanji · Japanese elementary school
Example	積む (to pile up)

How to read 積

積 is read seki (せき) or tsu (つ) depending on the word.

Words with 積

積極せっきょく
積乱雲せきらんうん
積むaccumulate / pile up
累積
堆積

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Kanji read the same way as 積

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Updated: 2026-08-28