noun
Portuguese-style hakama; calção-style hakama
A type of hakama (traditional Japanese trousers) designed in the style of pantaloons introduced by the Portuguese. Historical term; now mainly encountered in discussions of Edo-period clothing.
from Portuguese calção
See also: 袴
江戸時代には、カルサンと呼ばれる袴が流行した。
During the Edo period, a type of hakama called karusan became popular.
この絵には、カルサンを履いた武士が描かれて
This picture depicts a samurai wearing karusan.
Hakama is the general term for traditional Japanese divided or undivided trousers. カルサン refers specifically to a historical style influenced by Portuguese pantaloons.
From Portuguese 'calção' (pantaloons), referring to the style of trousers introduced by Portuguese traders in the 16th–17th centuries.