While Kotobuki Securities offers a wide range of traditional investment products like mutual funds and stocks, the details about the available trading platforms are not specified. It is likely that the company uses its own proprietary platform, as it primarily deals with more traditional financial instruments. However, for traders who are used to platforms like MT4 or MT5, it would be advisable to contact Kotobuki directly to confirm whether such platforms are available or if they have a custom trading system.