Used to describe items, facilities, or services intended for men, often with a refined or formal nuance from 紳士 (gentleman). Common in product labels, signs, and descriptions.
This store has a wide selection of men's accessories.
The gentlemen's restroom is on the second floor.
haberdasher
Compound of 紳士 (gentleman) + 用 (for use). The term likely emerged in the early 20th century as Western-style goods and facilities became common, using 紳士 to convey a sense of refinement.