Kyoyu Seisakusho Co., Ltd.

Fujisawa, Kanagawa, Japan Unknown Japanese Founded 1973 Official site

15-person Fujisawa job shop that machines and joins custom liquid-cooled jacket cold plates in aluminum, copper, and stainless steel, using friction-stir welding for Al/Cu lids and TIG plus distortion correction for stainless.

Core capabilities

Friction-stir welding (FSW) of aluminum and copper cold-plate lids on the same hybrid machining center as channel milling
Custom water-jacket cold plates in Al, Cu, and stainless steel
TIG hermetic welding plus press-based distortion correction for stainless jackets
Vacuum chamber and backing-plate fabrication

Related capability assets

FSW-joined custom liquid cold plates in aluminum, copper, and stainless

Customer-spec water-jacket cold plates: channels milled in the base, lid joined by friction-stir welding (Al/Cu) or TIG (stainless), then press-straightened so lid thickness—and therefore cooling—is uniform across the heat-source face.