| Readings | On-reading | たん |
| Kun-reading | すみ | |
| Meaning | coal / charcoal | |
| Radical |
火(灬)
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| Stroke count | ９ | |
| JLPT Level | N2 | |
Stroke order of 「炭」
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Vocabulary contains 「炭」
| Word | Meaning |
| 石炭（せきたん） | coal |
| 炭素（たんそ） | carbon |
| 炭鉱（たんこう） | coal mine |
