https://tmworks-web.jp/index.htm

T.M.WORKS is a limited company located in Yamanashi Prefecture. M. A brand of original parts developed by Works. It mainly sells tuning parts for ignition and electrical systems, and sells computers, plugs, coils, and harnesses.
By the way, Racechip is a German brand, ProRacing is a Polish brand, and they are a total importer in Japan.