Japan Moves to Ban Crypto Insider Trading with Tough New Penalties

TLDR

• Japan is preparing to ban insider trading in cryptocurrency markets through new legal amendments.
• The Financial Services Agency plans to introduce a surcharge system linked to profits from illegal cryptocurrency trading.
• The Securities and Exchange Surveillance Commission will gain power to investigate and penalize suspicious crypto trades.
• The new rules will extend insider trading bans to crypto assets under the Financial Instruments and Exchange Act.
• Japan faces challenges in defining insiders due to the decentralized nature of many cryptocurrencies.

Japan will introduce harsh penalties against insider trading in cryptocurrencies under a planned amendment to its securities law. The new rules will grant the Securities and Exchange Surveillance Commission (SESC) additional powers for investigating crypto trade activities. Authorities aim to strengthen oversight as digital asset adoption continues to rise across Japan.

New Surcharge Regime Targets Illicit Gains

Japan’s Financial Services Agency (FSA) plans to establish a surcharge system tied to gains made through unlawful crypto trading. This framework will enable the SESC to recommend penalty orders and refer severe violations for prosecution. These changes will bring crypto under the Financial Instruments and Exchange Act (FIEA).

Currently, insider trading rules in Japan exclude cryptocurrencies, which limits legal action against such activities. However, under the proposal, the FIEA will explicitly ban crypto trades using undisclosed or private information. The FSA intends to finalize the regulatory framework by the end of the year.

The proposed law will clarify the scope of insider trading in cryptocurrency. For example, disclosing secret details about token listings or system flaws may be considered illegal. Once implemented, it will mark a significant step toward formal oversight of Japan’s expanding cryptocurrency sector.

Defining Crypto Insiders Proves Complex

Japan faces a challenge in identifying who counts as an insider in the crypto space due to structural differences. Unlike stocks, many cryptocurrencies lack a central issuer, which complicates the enforcement of insider trading rules. This has kept most crypto insider cases outside legal boundaries in Japan.

Nonetheless, the new rules will close gaps and apply enforcement across exchanges. The FSA also plans to publish detailed guidance explaining the boundaries of insider activities. These will help define what counts as non-public information and clarify acceptable conduct.

The Japan Virtual and Crypto Assets Exchange Association (JVCEA) currently enforces self-regulation among exchanges. But officials believe this has left room for abuse, prompting the move to formalize standards. Japan’s lawmakers aim to close these loopholes through binding legislation.

Crypto Ownership and Adoption Rising in Japan

As of May 2025, Japan had recorded 12.41 million crypto holders, up from 9.17 million the previous year. Analysts expect this figure to reach 19.43 million by the end of December, indicating a sharp increase in adoption. Japan’s cryptocurrency market has grown faster than those of South Korea, India, and Vietnam.

The on-chain transaction value in Japan increased by 120% year-over-year by June 2025. This rapid growth has led to increased calls for robust protections and transparent regulations. Japan’s institutions now prioritize investor safety without discouraging innovation in digital assets.

Japan’s government will submit the proposed amendments during the next regular parliamentary session. If passed, these rules could significantly reshape the cryptocurrency landscape in Japan, with a lasting impact.

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