Y’s

A spin-off line launched in 1979 as a men’s-only line of Y's. It applies the patternmaking and tailoring developed at Y's to menswear, focusing on practical wardrobes that incorporate military and workwear elements. Despite periods of integration and restructuring, it remains a major line for men's expression at Y's.

Launched as an experimental/derivative subline of Y's, the line was led by designer Michiko Suzuki and presented collections that fused dresses with mannish elements. It presented at Tokyo Collection and is a historical subline that was paused (discontinued) around 2009 as part of a business reorganization.

A derivative line introduced in 2014 as an accessories line centered on shoes and bags. Its designs reflect Y's archive and experimentation with materials, and its focus on footwear and bags positions it as the specialist line within Y's accessories category. Projects and collaborations have also been officially announced.

A suit line for career women introduced in 2013. Centered on coordinated jacket, pants, and skirt sets, it systematically develops a range of items designed for business settings, serving to delineate the suit/workwear category within Y's lineup.

A dress line launched to systematize Y's dresswear category. Centered on combinations of different materials and dress silhouettes, it presents collections with a stronger emphasis on dresswear than Y's main line. It is a segment intended to be carried at directly operated stores and to occupy a distinct position from existing lines.

A cruise/daily-oriented diffusion line introduced in 2014, centered on knitwear and emphasizing materials and ease of wear. It carries on Y's philosophy while being designed at a more accessible price point, and is positioned as a line intended for distribution through Y's stockists nationwide, complementing the everyday knitwear and cut-and-sew category.

A diffusion line by a design team carrying on Y's DNA, it regularly presents collections incorporating a contemporary image of women and genderless elements. Seasonal looks and capsule projects are published officially, and while differentiated from the main Y's line, it complements it by serving relatively younger audiences and contemporary occasions for wear.

A seasonless unisex collection produced in small quantities, featuring numbered models based on men’s patterns. Launched in 2018, it is operated as a strongly independent offshoot line that uses Y's archival patterns while complementing genderless/unisex expression.

A licensed line of home products developed under the Y's name, encompassing product groups such as bedding, furniture, household goods, and some apparel. It was launched to extend the brand into the lifestyle domain and is positioned as the line responsible for home and living categories beyond apparel.