傘の巻き込みが強く丸く見える椎茸を冬菇（どんこ）といいます。
椎茸の傘が開き切らないうちに（７分開き程度）に収穫したもので、肉厚で綺麗な丸い形をしているため、古くから進物などの場面で好まれています。冬菇という漢字が示すように、1月〜3月ごろの冬期に採れる椎茸が冬菇になりやすいです。また、気温の急な上昇や雨が降ると、傘が一気に開いてしまうため、冬菇の状態で収穫するのは大変難しく、収穫しにくいので香信よりも高値になっています。
Shiitake mushrooms with tightly wrapped caps that look round are called donko.Shiitake mushrooms are harvested before the caps have fully opened (about 7 minutes), and because of their thick flesh and beautiful round shape, they have been popular for gift giving since ancient times.
As the kanji ``fuyusou'' indicates, shiitake mushrooms that are harvested during the winter season, from January to March, are more likely to become fuyusai. In addition, when the temperature suddenly rises or it rains, the umbrellas open all at once, making it very difficult to harvest winter daisies, making them more expensive than kashin.
