Sumitomo Riko Co. Ltd. (TYO:5191) recently held a ceremony in Yonezawa, Yamagata Prefecture, to mark the establishment of subsidiary SumiRiko Yamagata Co. Ltd., which will serve to manufacture and market automotive anti-vibration rubber. The ceremony was attended by Vice Governor of Yamagata Prefecture Tomoyuki Hosoya, Yonezawa City Mayor Masaru Nakagawa, Toyota Motor East Japan Inc. President Takeshi Shirane, Sumitomo Electric…