At around 10:30 in the morning on February 2nd, I was trying to increase my capital in FX (584,000 yen) and asked Mr. Kamijo, a BITTRA support person, to introduce me to an account, but I found out that the recipient of the transfer was a foreigner. I refused, but was informed that they could only introduce foreign accounts for amounts less than 1 million yen. I guess I had no choice but to transfer money to a foreign account, but I didn't receive any response regarding the transfer until around 11pm on February 2nd. It was a capital increase to trade at the big market price at 10:30pm on the night of February 2nd. 5-10 minutes after the big market transaction ended, Mr. Kamijo told me in the attached chat that the account I made the transfer into was frozen, and that I should immediately notify the bank to cancel the transfer, and that the FX trading account was suspected of being a money launderer. I was contacted to immediately transfer 600,000 yen as it would be frozen. It was a malicious tactic, such as going out of its way to contact me after a large market trade had been completed and I had made a large profit. After that, we communicated many times, but I heard a lot of strange Japanese, and I realized that the person was pretending to be Japanese. As a result of questioning, four people, including myself, were forced to leave the investment course the next morning. At the moment, Mr. Kamijo's chat is not marked as read despite my message. We have now realized that we were victims of fraud by an overseas fraud group.