Based on my experience and the information currently available, depositing funds into your YM Securities account using cryptocurrencies such as Bitcoin or USDT is not possible. From what I've seen, YM Securities only supports deposits via bank transfers, specifically with group banks like Yamaguchi Bank, Momiji Bank, and Kitakyushu Bank. There's also an EASY NET service for instant transfers, but even this is strictly tied to traditional banking systems within their group. I have not encountered any indication of support for crypto-based deposits. This approach is not surprising given that YM Securities is a regulated Japanese brokerage under the oversight of the Financial Services Agency (FSA). Japanese regulation is typically quite conservative regarding cryptocurrencies, especially for licensed securities firms, to reduce money laundering risks and enhance traceability of client funds. For me as a trader used to working with various brokers, the absence of crypto funding methods is a critical limitation, especially if your capital is already in digital assets or you prefer the speed and global accessibility that cryptocurrencies offer. If easy crypto-to-fiat transactions are a priority, another broker with more flexible funding options might be necessary. However, for those prioritizing regulatory safeguards and transparent banking procedures, YM Securities’ funding methods are quite conventional and in line with rigorous Japanese financial industry standards.