Jisho

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Noun
1. ton (esp. a metric ton, i.e. 1000 kg); tonne​Usually written using kana alone
Other forms
噸 【トン】、瓲 【トン】
Notes
屯: Ateji (phonetic) reading, Rarely-used kanji form. 噸: Ateji (phonetic) reading, Rarely-used kanji form. 瓲: Ateji (phonetic) reading, Rarely-used kanji form.

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