The draft report stops short of formally recommending the introduction of blocking, but establishes the legal and operational considerations required should the government decide to proceed. Authorities are now expected to assess the effectiveness of existing countermeasures before determining whether to adopt the more intrusive approach.

The move reflects growing concern within government and policy circles over the accessibility of offshore online casino platforms, particularly among younger users. Members of the panel described illegal operators as highly exploitative, with calls for stronger safeguards to prevent harm and reduce exposure.

Under the proposed framework, website blocking would involve internet service providers restricting access to designated domains identified as illegal. The mechanism is already used in Japan in limited cases, most notably to combat child exploitation material, but its expansion into gambling raises significant legal and constitutional questions.

Central to the debate is Japan’s strict protection of the secrecy of communications, a right enshrined in law that limits the ability of authorities and private companies to monitor or interfere with user activity. Implementing blocking measures would likely require telecommunications providers to assess traffic destinations at scale, prompting concerns over privacy and proportionality.

The panel acknowledged that blocking could be effective in reducing access, particularly among younger or more casual users, but emphasized that it should be considered a last-resort measure. The report recommends that authorities first exhaust less intrusive options before moving toward direct access restrictions.

Japan has already introduced a range of alternative measures aimed at curbing online casino usage. These include prohibiting social media content that directs users to gambling sites and engaging with foreign jurisdictions to limit access to offshore operators targeting Japanese consumers. According to the report, these efforts have delivered a “certain degree of effectiveness,” although enforcement challenges remain.

Survey data cited in the report suggests that access to overseas casino platforms from within Japan remains largely unchanged, indicating that current measures have yet to significantly disrupt user behavior. Awareness of the illegality of online casino gambling has also plateaued at around 60 percent, highlighting the need for further public education and enforcement efforts.

Industry observers note that the persistence of access points to offshore platforms underscores the technical and jurisdictional difficulties of regulating cross-border online gambling. Even with coordinated public and private sector action, operators continue to adapt through mirror sites, alternative domains and other circumvention tools.

The panel’s chair, Masahiro Sogabe, described the report as a framework for future decision-making, outlining the issues that must be addressed before any blocking regime is introduced. He indicated that further deliberations will be required in separate policy forums before a final determination is made.

Constitutional law expert Joji Shishido emphasized that website blocking should be viewed as a final step within a broader enforcement strategy. He noted that any move toward implementation would require a significantly more robust legal and technical infrastructure.

The government’s next phase will focus on evaluating whether existing measures can be strengthened to achieve meaningful reductions in access and participation. Only if those efforts prove insufficient is Japan likely to proceed toward the more controversial option of website blocking, marking a potentially significant escalation in its approach to regulating illegal online gambling.