Himitsudō 是东京台東区的美食去处。包括 カズハの腹筋部屋 在内的 1 位 YouTube 旅行博主在 1 个片段里提到过它。
“By the way, this place we've been at is a super famous shaved ice specialty shop called Himitsu, and it seems that Takuya Kimura has also been here during the daytime.”