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Japanese Crypto Exchange Bitbank Limits Polymarket-Related Fund Transfers

Reported by Gadgets360
Jun 15, 2026· 2 min read
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Key Takeaways
  • • Bitbank, a Japanese FSA-licensed cryptocurrency exchange, has implemented restrictions on fund transfers related to Polymarket, citing regulatory compliance concerns in response to Japan's strict gambling classification of prediction markets.
  • • Polymarket is actively pursuing market entry into Japan despite facing a complex regulatory environment where online gambling is limited to government-authorized activities such as horse racing and public lotteries, with the company targeting approval by 2030.
  • • A Polymarket-linked infrastructure exploit resulted in estimated losses between $520,000 and $660,000, adding to mounting security and operational concerns surrounding the prediction-market platform.
  • • The U.S. House Oversight Committee has launched an investigation into Polymarket and rival platform Kalshi regarding insider trading risks on prediction-market platforms, widening regulatory scrutiny beyond Japan.
  • • Polymarket appointed Mike Eidlin, formerly head of Japan at crypto firm Jupiter, to lead Japan market development and lobbying efforts for prediction-market authorization.
Summary
Bitbank, one of Japan's major FSA-regulated cryptocurrency exchanges, has implemented restrictions on transfers related to Polymarket, the prediction-market platform seeking to expand into the Japanese market. The limitation reflects heightened regulatory caution as Polymarket faces intensifying scrutiny across multiple jurisdictions and operational challenges.

Polymarket's Japan ambitions face substantial headwinds given the country's restrictive regulatory framework. Online gambling in Japan is generally confined to government-authorized activities including horse racing and public lotteries, creating a challenging path for prediction markets to gain acceptance. Despite these obstacles, Polymarket has appointed Mike Eidlin, previously head of Japan operations at crypto firm Jupiter, to lead the company's Japan expansion efforts and coordinate lobbying for regulatory approval. The company has set an ambitious target of securing Japanese government authorization by 2030.

The prediction-market platform is simultaneously grappling with multiple operational and regulatory crises. A Polymarket-linked infrastructure exploit resulted in confirmed losses ranging from approximately $520,000 to $660,000, highlighting security vulnerabilities within the platform's ecosystem. These technical issues compound existing concerns about the platform's operational maturity and risk management protocols.

Regulatory pressure on Polymarket extends beyond Japan. The U.S. House Oversight Committee has opened a formal investigation into both Polymarket and competing platform Kalshi, focusing specifically on insider trading risks inherent to prediction-market structures. This congressional scrutiny represents a significant escalation in U.S. regulatory attention toward the prediction-market sector and raises questions about the platforms' compliance infrastructure and market surveillance capabilities.

Bitbank's decision to limit Polymarket-related transfers reflects the broader institutional caution surrounding prediction markets in jurisdictions with stringent gambling regulations. As a licensed exchange operating under FSA oversight, bitbank's compliance posture signals how Japanese-regulated entities are interpreting their obligations in response to Polymarket's regulatory status and the platform's operational challenges.

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Sources

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Gadgets360 Japanese Crypto Exchange Bitbank Limits Polymarket-Related Fund Transfers