What is the 'Kochi Lab' series?

It is a private brand series by Shimamura that focuses on comfort and sustainability, using sustainable materials.

What has changed with the new innerwear materials?

A smooth and soft Tencel™ fiber material has been added, and the traditional cotton material has been improved to be more flexible and 'mochi-mochi' in texture.

Where can I purchase these items?

You can purchase them at any Shimamura Fashion Center store nationwide.

Shimamura Improves the Feel of PB 'CLOSSHI' 'Kokochi Lab' Innerwear! Newly Introducing Soft TENCEL™ Fiber Material

Published Apr 3, 2026 6:10 PM ・ Updated Jun 13, 2026 11:45 PM ・ 3 min read ・ Source: PR TIMES

Shimamura Co., Ltd. has updated its sustainable innerwear line 'Kokochi Lab' under the 'CLOSSHI' brand, adding ultra-soft TENCEL™ fibers and upgrading the cotton material for a smoother, 'mochi-mochi' texture.

Shimamura Co., Ltd. (Headquarters: 1-602-1 Kitabukuro-cho, Omiya-ku, Saitama City, Saitama Prefecture; Representative Director: Iichiro Takahashi) is improving the texture of the "Kokochi Lab" innerwear from its private brand "CLOSSHI" and will newly sell products using "TENCEL™ fiber materials" at Fashion Center Shimamura stores nationwide.

*TENCEL™ and Tencel™ are trademarks of Lenzing AG.

■About "Kokochi Lab" "Kokochi Lab" is a series using sustainable materials with the concept of "comfort" that is pleasant for the earth and everyday life. It is an environmentally friendly, sustainable product that uses materials grown through sustainable production methods.

▼Click here for the "Kokochi Lab" special feature page https://www.shimamura.gr.jp/shimamura/sp/kokochilab/

■Features of "Kokochi Lab" innerwear "Kokochi Lab" innerwear is a series that focuses on a good texture and feel against the skin. This season, the smooth and exceptionally soft "TENCEL™ fiber material" will be newly added to the lineup. In addition, the "cotton material" of the ladies' innerwear, which was well-received last year, has been updated to have increased flexibility and a "mochi-mochi" (doughy and soft) feel.

■Ladies' product lineup Products using "TENCEL™ fiber materials" and "cotton materials" will be rolled out.

FACT BOX

Source: PR TIMES
Category: New Product
Organizations: Lenzing AG
Products / services: CLOSSHI

Shimamura Improves the Feel of PB 'CLOSSHI' 'Kokochi Lab' Innerwear! Newly Introducing Soft TENCEL™ Fiber Material

⚡ Key Points

■About "Kokochi Lab" "Kokochi Lab" is a series using sustainable materials with the concept of "comfort" that is pleasant for the earth and everyday life. It is an environmentally friendly, sustainable product that uses materials grown through sustainable production methods.

■Ladies' product lineup Products using "TENCEL™ fiber materials" and "cotton materials" will be rolled out.

FACT BOX

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