If you cut it and heat it, the skin will peel off along with the oni skin.
Chestnuts are very short in cooking time, and are popular now.
The trick is to peel it while it's hot, so be careful not to overheat it all at once!
In the case of a range, heat and peel about 5 pieces each, and heat the next one while peeling.
If you boil it, it is a good idea to take it out little by little and peel it off so that it does not cool down.
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