Specialties. Seto teacups, Seto black. Oharagi is firewood cut from the mountains of Ohara, and is also called Kuroki. It is said that this tea bowl was given this name because it is a black tea bowl with a wretched appearance. It is cylindrical, slightly triangular in shape, and made in a Wabi-style, and is said to have been Rikyu’s most favorite. After Rikyu, it was sold to Tetsunosuke Akahoshi, and in 1917 (Taisho 6), it was sold for 21,000 yen to Ryocho Toda at the time of the sale by the same family. (Taisho Meikikan)