Japan Exchange Group (JPX) is contemplating tighter regulations to address concerns over listed companies heavily investing in cryptocurrencies, following significant retail losses. The proposed measures include stricter enforcement against backdoor listings and re-audits of companies. JPX has already requested three potential digital asset traders (DATs) to halt their plans and cautioned that financing could be limited if crypto accumulation remains a primary strategy. Japan currently leads Asia with 14 listed companies investing in Bitcoin, with Metaplanet being the largest. However, Metaplanet has seen its value plummet by over 75% since its peak in June, highlighting the volatility and risks associated with such investments.