It is hard to determine the authenticity of Yamaoka Masatoshi as an investor based on the information given. It is worth noting that it is unusual for banks to ask for transfer fees prior to releasing funds from an international wire transfer. It is advisable to exercise caution when dealing with unsolicited offers or requests for personal information or payment before confirming the identity and credibility of the person or organisation. It is recommended to seek advice from a financial expert or lawyer before engaging in any investment opportunities and to verify the information provided by the investor, the bank and the wire transfer.