Japan's Prime Minister Sanae Takaichi used her UN General Assembly speech on Tuesday to declare Japan's "consistent support" for the International Criminal Court, directly countering Donald Trump's call for all member states to abandon the body he labeled "out of control." The statement matters because it came hours after Trump escalated his rhetoric, urging ICC members to "officially resign from this rogue institution immediately." US Secretary of State Marco Rubio has previously called for the ICC to be dismantled "brick by brick." Takaichi's move was not spontaneous. She faced mounting domestic pressure from a cross-party group of Japanese lawmakers, including former Defence Minister Gen Nakatani, who urged her to use the General Assembly to defend the court. The ICC's president, Tomoko Akane, is Japanese — making Tokyo's silence on US sanctions politically untenable at home. Takaichi had earlier drawn criticism for describing the sanctions as merely "very unfortunate" before upgrading her language to "incompatible" with Japan's stance. The diplomatic choreography is precise: support the ICC, but avoid naming Washington as the threat. Takaichi's speech emphasized postwar Japan's commitment to the "rule of law in the resolution of all conflicts" — framing the ICC endorsement as continuity, not confrontation. She confirmed a "candid exchange" with Trump on the ICC during sideline discussions, suggesting the disagreement was acknowledged privately while managed publicly. The reason for this careful calibration is geographic, not ideological. Japan's security architecture depends on the US alliance amid escalating Chinese military activity in the South and East China Seas, and Tokyo's commitment to supporting democratic Taiwan. Japanese officials are reportedly concerned that Trump could use Taiwan as leverage in trade discussions with Xi Jinping scheduled for Thursday in Washington — a fear grounded in Trump's transactional approach to alliances. The US sanctions on the ICC were triggered by the court's arrest warrant for Israeli Prime Minister Benjamin Netanyahu and an ongoing investigation into alleged American war crimes in Afghanistan. Washington's position — that the ICC represents an "intolerable threat to US sovereignty" — places every US ally with ICC membership in a structural bind: defend the institution and risk bilateral friction, or stay silent and erode the multilateral order that smaller powers depend on. ICC President Akane responded to the sanctions with defiance: "The ICC will never be defeated. Justice will and should prevail." But institutional defiance means little without member-state backing. Japan's statement matters precisely because it comes from a close US ally — it signals that Washington's campaign to isolate the ICC has limits, even among its inner circle. The 20-year question is whether the rules-based international order can survive its most powerful architect turning against its institutions. If US pressure succeeds in hollowing out the ICC, the precedent extends far beyond one court — it signals that any multilateral body investigating great-power behavior can be sanctioned into irrelevance. Japan's hedge — support the principle, manage the patron — is the posture most US allies will adopt. Whether it's enough to keep the institution functional is another matter entirely.
