While Kyogin Securities is regulated and offers a variety of investment products, the primary disadvantage is its trading fees. The fees can be relatively high, especially for smaller trades. For example, for trades up to ¥1,000,000, the commission is 1.21%, which may not be cost-effective for smaller traders. Additionally, the minimum commission charge of ¥2,750 could be a deterrent for those with smaller portfolios. From my experience, these fees could be an issue for retail traders who trade in smaller volumes.