Coincheck is a Japanese bitcoin wallet and exchange service headquartered in Tokyo, Japan, founded by Koichiro Wada and Yusuke Otsuka. It operates exchanges between bitcoin, ether and fiat currencies in Japan, and bitcoin transactions and storage in some countries. In April 2018, Coincheck was acquired by Monex Group for 3.6 billion yen. Coincheck since 2016 has been the trademark name of a numismatic supply company located and trademark registered in the United States since 2016. Wikipedia