On April 4, Japan's Financial Services Agency officially announced the "Guidelines for Strengthening Cybersecurity in Cryptocurrency Trading Businesses" aimed at cryptocurrency exchanges and related institutions. These guidelines were developed based on 18 feedback comments received during the public consultation period from February to March 2026, prioritizing the protection of investor assets. The guidelines aim to enhance overall security measures through three levels: "self-defense" by exchanges, "mutual cooperation" among industry self-regulatory organizations, and "public support" from regulatory authorities. Currently, the tactics employed by criminals are becoming increasingly covert, targeting not only private keys (such as mnemonic phrases) but also frequently utilizing social engineering attacks and infiltrating third-party outsourcing agencies. In response, the guidelines emphasize the need for relevant institutions to strengthen their systematic response capabilities.