One significant downside of trading with i SECURITIES is the lack of a demo account, which makes it challenging for beginners to practice trading without risking real money. Additionally, i SECURITIES only offers services in Japanese, creating a language barrier for non-Japanese speakers. Although the company provides various trading instruments, the risks associated with trading products such as Forex and CFDs should be carefully evaluated. The lack of international regulatory oversight may also be a concern for some traders looking for more extensive global protection.