Kishun Co., Ltd. is a Japanese reframing company focused on the reuse and recirculation of gemstones and precious metals. With a guiding ambition to uncover lasting value and deliver transformative experiences, the company works across the lifecycle of pre-owned jewelry and related goods.

Its integrated operations include purchasing, appraisal and identification, processing, sales, and auctions. Services include Colored Stone BANK for gemstone purchasing, gem identification, a jewelry workshop, retail and other sales activities, and auction operations. By restoring and presenting the value of previously owned materials, Kishun aims to create new circulation and make greater use of resources that might otherwise be overlooked.

The company is based in Okachimachi, Tokyo, an area known for its gemstone industry, and is developing its global strategy, with markets including Hong Kong, Taiwan, Dubai, and Las Vegas in its sights. Kishun also emphasizes technology, employee development, and sustainability, seeking to contribute to society through its business while expanding the value it offers in Japan and overseas