Does bitFlyer require KYC?

Could you please clarify whether or not bitFlyer, as a cryptocurrency exchange, mandates Know Your Customer (KYC) procedures for its users? I'm particularly interested in understanding if they enforce strict identity verification measures to comply with anti-money laundering regulations and ensure the security of their platform. Are there any specific steps or documents that users need to provide in order to complete the KYC process on bitFlyer? Additionally, is there any information available on how bitFlyer handles and protects the personal data collected during the KYC verification process?