そう言えば、東大寺の大仏殿のくぐり穴がある柱を思い出しました。
We can see the pillar has a slit where sliding doors go through. This is my first time to see such a structure.
I remembered that the Hall of the Great Buddha of Todai-ji Temple in Nara Prefecture has a special pillar, and there is a small hole in it. Many tourists challenge to pass through the hole with difficulty. If the person who can pass through the hole, the person will spend healthy hereafter.
