Shinshu-Matsumoto Airport — Matsumoto, Japan

Shinshu-Matsumoto Airport (MMJ) serves Matsumoto, a historic castle city in Nagano Prefecture, Japan, nestled in the Japanese Alps. Known locally as Shinshu Matsumoto Airport, it holds the distinction of being Japan's highest-elevation airport, which presents unique operational challenges given the surrounding mountainous terrain. MMJ offers domestic flights, primarily to Osaka and other regional hubs, serving tourists heading to Matsumoto Castle, one of Japan's most well-preserved original castles, as well as visitors bound for nearby ski resorts and the Japanese Alps National Park. The airport's scenic mountain backdrop and relatively small scale reflect its role as a regional gateway rather than a major international hub, supporting Nagano Prefecture's tourism and business travel needs.