means "third one" in Japanese. It may refer to:
, a Japanese pharmaceutical company and a successor of , since 2005. , a Japanese manufacturer of pachinko machines Sankyo Flute Company, which produces silver, 5K, 10K, 14K, 18K, and 24K gold flutes Nidec Sankyo, a Japanese manufacturer of music boxes and electronic components, successor to Sankyo Seiki Mfg. Co. since 2005, part of the Nidec Group Sankyo Seiko Co., Ltd. (三共生興グループ)