What are the main sectors of crypto in Japan?

In Japan, the cryptocurrency ecosystem has grown significantly in recent years, drawing the attention of investors and enthusiasts alike. As a keen observer of this developing landscape, I'm curious to delve deeper into the main sectors that comprise Japan's crypto scene. Firstly, how is the crypto trading and exchange sector shaping up? Are there any notable exchanges that have emerged as leaders in this space? Secondly, I'm interested in the regulatory framework surrounding cryptocurrencies in Japan. What policies have been implemented to safeguard investors and foster a healthy crypto environment? Furthermore, how are blockchain-based startups and projects finding their footing in Japan? Are there any notable use cases or applications that are gaining traction? Lastly, I'd like to understand the role of crypto in Japan's financial services industry. Are traditional banks and financial institutions embracing crypto, or are they taking a more cautious approach? Answers to these questions would help me gain a comprehensive understanding of the main sectors and dynamics of crypto in Japan.