29 October 2026International edition
Vol. I · No.
29 October 2026
AI IN FASHION
DAILY
The daily briefing on AI in the fashion business
Where fashion meets artificial intelligence.
Premium and contemporary

23区

Onward Kashiyama · Japan

23区 (23ku) is a Japanese womenswear brand operated by Onward Kashiyama, launched in 1993. It makes simple, high-quality and comfortable clothing designed to be worn across generations.

Facts
OperatorOnward Kashiyama
Launched1993
CategoryWomenswear
FlagshipAoyama, Tokyo
Website23ku.jp
Segment
Premium
Categories
Womenswear
Sales channels
Own stores

What is 23区?

23区, romanised as 23ku, is a womenswear brand from Japan operated by apparel company Onward Kashiyama. It debuted in 1993 and celebrated its 30th anniversary in 2023.

Products and positioning

The brand's philosophy is to make simple, high-quality and comfortable clothes that are loved widely and for a long time, across generations and eras. Its offer centres on refined basics, complemented by seasonal pieces. For its 30th anniversary Autumn/Winter 2023 collection, presented as a runway show under the theme Things in the Suitcase, 42 looks included leather jackets, houndstooth skirt sets and denim sets.

Distribution

23区 is sold through stores in shopping centres across Japan, including Mitsui Outlet Park locations in Yokohama, Tama and Osaka Kadoma. The brand has also opened a flagship store in Aoyama, Tokyo.

Why it matters

23区 is one of the core womenswear labels of a major Japanese apparel group, illustrating the department store driven model of Japanese premium fashion and its shift towards flagship stores and brand events.

Frequently asked questions

Who owns 23区?

23区 (23ku) is operated by the Japanese apparel company Onward Kashiyama.

When was 23区 launched?

23区 debuted in 1993 and marked its 30th anniversary in 2023.

Onward Kashiyama: all brands
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