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Yōhen (usually 曜変). Dark glazes, blue speckles. Three have survived, each a national treasure:
Inaba Yōhen in Seikadō Bunka in Tōkyō. Belonged to the Tokugawas, who gave it to the Inabas in XVII, then it went to the Iwasaki, who gave it to the museum.
Fujita Yōhen, belonged to Ieyasu Tokugawa, transmitted in this line until 1918, when it was given to the Fujita.
Ryōkō-in Yōhen, at the temple with the same name at Daitokuji.
Yoshiaki Dōbuchi apparently makes fine ones today.
Yuteki (oil drop, 油滴). Black glazes and blue and silver stars.
Kensan (建盞, all the Jian bowls that are not in the above categories). Often streaky glazes which are also called hare-fur bowls (in Japan, however, often called 禾目).
Usan (烏盞, crow-black bowls).
Taihisantenmoku (bowls made in other kilns, eg Jizhou). Naturalistic glazes like flower designs or turtle.
Cheap rest, which includes haikatsugi (灰被, which then in the 詫び-fication of tea became the new sh*t.
Terms
覆輪. Silver (or gold or copper rim) around the
茶碗
台
ほうずき: The “cup” of the stand that holds the bowl.