Sincere Co., LTD. manufacture and sells contact lenses in Japan. It operates through three segments: Contact Lens, Consulting, and System business. The company also engages in consulting on medical hair removal clinic management, as well as the design, development, sale, and maintenance of package systems for the reuse industry. In addition, it provides management support for medical institutions, medical related businesses, and elderly facility management. The company was incorporated in 2008 and is headquartered in Tokyo, Japan.