Only three of those century old Yohen Tenmoku tea bowls still exist.

The bowls are believed to have been produced in “Jian-yao” kilns in China’s Fujian province before being brought to Japan between the 12th and 13th centuries during the Southern Song period (1127-1279).

They are national treasuries today. https://image.nostr.build/d69618c61ab00cc288afbc6218114403f6ee8fcafc327822e1270f9afa16447a.jpg