Who regulates Japan cryptocurrency exchanges?

Could you elaborate on who precisely regulates the cryptocurrency exchanges in Japan? Given the increasing popularity and significance of digital currencies, it's crucial to understand the regulatory framework governing these platforms. Is it a dedicated agency, a branch of the government, or a consortium of authorities? What are the primary objectives and responsibilities of these regulators in ensuring the stability and fairness of the crypto market in Japan? I'm particularly interested in how they handle issues like market manipulation, consumer protection, and compliance with anti-money laundering regulations.