URL：https://upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Japanese_Binchōtan_(Japanese_high-grade_charcoal_produced_from_ubame_oak).jpg/330px-Japanese_Binchōtan_(Japanese_high-grade_charcoal_produced_from_ubame_oak).jpg
掲載元：https://zh-classical.wikipedia.org/wiki/備長炭
