JPYC Price Surge Exposes Regulatory Weaknesses in South Korean Crypto Market

The launch of JPYC on South Korea's largest exchange, Upbit, was supposed to be a major milestone for yen-pegged tokens in the country. But instead, it turned into a chaotic episode that exposed significant weaknesses in the regulatory framework.

JPYC listed on September 17, 2026, and within hours of its launch, the token's price had skyrocketed to 37.6 KRW, more than three times its intended peg value of 12 KRW. The rapid increase was not due to any exploit or coordinated pump scheme but rather a direct consequence of South Korea's rules, which treat market-making activities as potential market manipulation.

As a result, professional liquidity providers who typically smooth out price swings on new listings were barred from participating in the JPYC launch. This regulatory gap allowed for unchecked buying pressure and fueled a massive trading volume of over 54% on Upbit, with total trades exceeding 2.4 trillion KRW in the initial hours.

The aftermath was devastating, with data showing that over 21,219 investors bought JPYC at premiums exceeding 10% above its reference rate, spending roughly 260 billion KRW in the process. By September 21, some 3,792 of these investors were still holding positions with aggregate unrealized losses approaching 5 billion KRW.

The episode has become a catalyst for regulatory reassessment, with industry participants and lawmakers pushing the Financial Services Commission (FSC) to formally legitimize market-making activities for digital assets. This shift would represent a significant change in South Korea's regulatory posture and would integrate market-making provisions into the forthcoming Digital Asset Basic Act.