Komogai-nari: Komogai Shape Tea Bowls

This shape originated in Korea. Those imported to Japan were said to have come from the Korean port of Komogai, hence the name.

端反り型, Hatazori-gata (curving-lip type) may just be another more descriptive name for this shape - at the moment I am unaware of any real differences in the shapes themselves.

Teabowl, known as Yamana, Yi dynasty, Korea

This photo is from the Miho Museum.