Coincheck is a Japanese centralized cryptocurrency exchange that has been active since 2014. Trading Volume Coincheck allegedly has the highest Bitcoin trading volume in Japan. They have been witnessing a tremendous growth in trading volume. On the date of last updating this review (2 December 2021), the 24-hour trading volumes was approx. USD 122.9 million. In comparison, the trading volumes on 21 March 2020 were only USD 56.5 million, so a great improvement for sure.