KACHIKA's Business Socks 'LAYER GUARD™' with Bamboo Fiber and Unique Cushion Structure Achieves Amazon Bestseller Status

KACHIKA (Kachika), a private label brand operated by SynaBiz Inc. (Headquarters: Shinagawa-ku, Tokyo; CEO: Keimei Ishimaru; 100% subsidiary of Oakfan Inc.), has achieved the No.1 ranking on Amazon's bestseller charts with its business socks 'LAYER GUARD™' as of June 16, 2026.

Product Page: https://amzn.asia/d/09etufcu

About 'LAYER GUARD™'

'LAYER GUARD™' is a business sock designed with the needs of professionals who wear shoes for extended periods. It addresses common foot discomforts such as odor, moisture, and blisters.

Key Features:

・ Made with bamboo fiber

・ 3D layered cushion structure at toe and heel

・ Designed to reduce odor, sweat, and friction

・ Solid, professional design suitable for business wear

Customer Feedback

The product has received a 4.2-star rating from customers (as of June 16, 2026).

Reviews highlight: "Odor remains minimal even after long wear," "Less sweating and moisture buildup," "Durable at toe and heel," "Comfortable fit," and "Excellent value for money," reflecting strong approval for both functionality and everyday usability.

Product Information

・ Product Name: KACHIKA 'LAYER GUARD™ (Layer Guard)'

・ Material Composition: Bamboo fiber, cotton, polyester, polyurethane

・ Features:

- Bamboo-derived fiber

- 3D layered cushion structure (toe and heel)

- Non-marking design

- Solid, business-appropriate design

・ Sales Channel: Amazon.co.jp

・ Product Page: https://amzn.asia/d/09etufcu

About KACHIKA

— Changing value. Changing through value. —

KACHIKA is a private label brand born with the mission to deliver truly valuable products, guided by the concept of 'not creating the ordinary.'

In an era flooded with 'seen-it-before' products, KACHIKA is committed to shaping only those items that hold genuine value.

Through thoughtful choices and attention to detail, KACHIKA aims to quietly align with customers' values, creating moments that 'click' perfectly into place.

KACHIKA Store Page: https://www.amazon.co.jp/stores/KACHIKA/page/34E71B29-9B8A-436E-AE41-7406C6013B3E?lp_asin=B0G8YSDZLS&ref_=cm_sw_r_ud_ast_store_TNP02A21P8P4AE29VBMR&store_ref=bl_ast_dp_brandlogo_sto

About the Oakfan Group

The Oakfan Group leverages data and technology to operate distribution platforms that connect suppliers and buyers in domestic and international markets.

Its established businesses include the market price search service 'Oakfan' and the B2B trading platform 'NETSEA,' forming a stable revenue foundation.

Building on this foundation, the group is now advancing its proprietary brands and live commerce business 'NETSEA MallLive' as growth drivers. Centered on 'D2X (Direct to X) Commerce,' which supports end-to-end operations from product planning to sales, the group is establishing new distribution models.

Moving forward, the group will continue to strengthen its core businesses while expanding into new growth areas, enhancing its overall business structure.

SynaBiz Inc. Company Overview

・ Representative: CEO Keimei Ishimaru

・ Founded: July 2015

・ Capital: 25 million JPY (100% funded by Oakfan Inc., listed on the Tokyo Growth Market)

・ Address: 7F, Sumitomo Realty Ohsaki Twin Building East, 5-1-18 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001

・ URL: https://synabiz.co.jp/