MITSUI does allow trading of international stocks, primarily from the US markets (NYSE and NASDAQ). However, the key limitation is that foreign stocks cannot be traded online through the SHIZUGIN TM platform. Traders wishing to invest in foreign stocks must use offline methods or contact customer support for guidance. This could be an inconvenience for traders who wish to trade international stocks directly from an online platform. For those primarily interested in Japanese or US-based stocks, the platform remains a robust option.