There are multiple crypto exchanges that operate in Japan. Crypto traders in Japa can enjoy several crypto trading services via these exchanges. They can purchase, sell and trade different cryptocurrencies in both centralized and decentralized crypto exchanges.
Below are crypto exchanges that can be accessed by Japan residents when they want to buy cryptocurrency within their country.
Disclaimer: This is not an endorsement for any of the aforementioned crypto exchanges. As always, do your due diligence before using any of them or purchasing cryptocurrency in Japan.