KOSO is the brand of Tong Ya Electronic Technology Co., Ltd., a Taiwan-based company located in Tainan. Its product range serves motorcycle and powersports applications, bringing together instrumentation, lighting, heating, performance components, and styling accessories. KOSO offers dashboards and plug-and-play products, alongside headlamps, auxiliary lights, taillights, indicators, and license-plate lights.

Its heating category includes integrated heated grips, removable heaters, heated grips, and heated steering wheels. Performance products cover engine, transmission, induction, carburetor, and cooling and lubrication systems, as well as electronics. The range also includes steering systems, body and fairing parts, and universal accessories.

KOSO organizes its offerings into categories such as CYGNUS-X, Racing S, Classic, and Race, helping visitors explore products by type and application. The company provides product instructions, videos, catalogs, and other downloadable materials through its website. Its news and events listings show participation in international exhibitions, including EICMA, CES, and AIMExpo.

KOSO presents its brand with the tagline “Feel The Speed. ”