shallow round hat; manjū-shaped hat
A traditional Japanese hat with a shallow, rounded crown resembling a half manjū (steamed bun). Often associated with travelers, pilgrims, or certain historical figures.
See also: 饅頭 (まんじゅう)
In period dramas, you often see travelers wearing a manjū-shaped hat.
The figure in this ukiyo-e print is wearing a manjū-shaped hat pulled down low.