In Japan, all forex & CFD brokers are strictly regulated by the Japan Financial Services Agency (JFSA). Although this means that trading leverage is limited to a maximum of 1:25, being regulated also means that there is a credible government agency traders could turn to in the rare event of a dispute with a broker.
Fortunately for Japanese forex trading enthusiasts, the legendary MetaTrader 4 (MT4) trading platform is usually available from forex brokers in Japan. As is widely known by now, the MT4 was a revolutionary trading platform when it first came out, giving traders access to advanced features such as reliable backtesting of systematic (non-discretionary) trading strategies.