炉 — “Hearth / Furnace / Kiln / Reactor” in Japanese

Master (高手)ろ, いろり

Radical ⽕ · radical 86 The building block this kanji is filed under

“Hearth / Furnace / Kiln / Reactor” in Japanese is 炉, read ro, irori (ろ, いろり). It is a Jōyō kanji taught in Japanese secondary school (junior & senior high) — the 高手 · Master tier beyond the grade 1–6 Kyōiku set, and appears in words such as 原子炉 (nuclear reactor).

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What does 炉 mean?

Full details, readings & example

Kanji	炉
Meaning	Hearth / Furnace / Kiln / Reactor
Readings	ろ, いろり
Grade	Master (高手 · secondary school)
Curriculum	Jōyō kanji · Japanese secondary school (JLPT N1–N2)
Example	原子炉 (nuclear reactor)

How to read 炉

炉 is read ro (ろ) or irori (いろり) depending on the word.

Words with 炉

原子炉

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Updated: 2026-08-28