Chiikawa: The Secret of Mermaid Island becomes Japan's top-grossing 2026 film at ¥13.89 billion
ORICON reported on September 7 that Chiikawa: The Secret of Mermaid Island reached 9.6 million Japanese admissions and ¥13.89 billion after 45 days, passing Detective Conan: Highway no Datenshi at a reported ¥13.7 billion to become Japan's highest-grossing 2026 release so far. The film also moved to 23rd on Japan's all-time box-office chart and returned to first place for the September 4-6 weekend with 928,000 admissions and ¥1.415 billion. These are domestic running totals, not a final or worldwide gross.
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