Japan, Taiwan and the “One China” Framework after 50 Years

This study analyses the “one China” framework's significance for Japan–Taiwan relations since Tokyo switched diplomatic recognition from Taipei to Beijing in 1972. Drawing on Chinese-, Japanese- and English-language sources, it examines developments since the breakthrough Japan–PRC normalization communiqué and the “Japan formula,” which enabled Tokyo to normalize relations – six years before Washington – without recognizing Beijing's claim of sovereignty over Taiwan, and while maintaining robust, if unofficial, ties with Taipei thenceforth. Highlighting distinctions between Beijing's self-asserted “one-China principle” and Japan's ambiguous official position and subsequent effective policies, it assesses incremental but practically significant evolutions of Japan–Taiwan relations over the past half-century. In the 21st century, the trend towards incrementally closer ties has proven strikingly resilient to political transitions in Japan and Taiwan, China's growing power, pushback from Beijing and worsening cross-Strait frictions. Beyond Japan–Taiwan relations and theoretical debates on “one China,” this article's findings carry significant implications for Taiwan's international space, cross-Strait dynamics and China–Japan–United States relations.