Qualla: Tachikawa Airfield: Tokyo's Secret Bunker City

Tachikawa Airfield: Tokyo's Secret Bunker City: Introduction

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit United States Air Force, Public domain. On June 18, 1953, a U.S. Air Force C-124 Globemaster II lumbered off the runway at Tachikawa, lost an engine seconds after takeoff, and crashed into a field near the base. All 129 people aboard died -- at the time, the deadliest air disaster in history. The runway that killed them was too short for the planes that needed it, and the neighborhood beyond the fence had grown so close that extending it would spark riots. That tension between a military airfield and the sprawling city that swallowed it defines Tachikawa's century-long story. What began as an Imperial Guard outpost on flat farmland west of Tokyo became Japan's first commercial airport, then the busiest American air transport hub in the Pacific, and finally -- after the last aircraft departed and the runways went quiet -- something stranger still: a disaster-preparedness fortress built atop a network of wartime tunnels, enlarged to sustain 5,000 people underground for an entire year.

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Image: United States Air Force | Public domain

Tachikawa Airfield: Tokyo's Secret Bunker City: Biplanes and the Birth of Japanese Aviation

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit ブルーノ・プラス, CC BY-SA 4.0. The Imperial Guard chose this stretch of flat ground along the Chuo Main Line railway in western Tokyo after considering sites in Sagamihara, Kawagoe, and Kodaira. Proximity to central Tokyo, good rail access, and sparse population made Tachikawa ideal. On March 14, 1922, a flyin...

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Image: ブルーノ・プラス | CC BY-SA 4.0

Tachikawa Airfield: Tokyo's Secret Bunker City: From Ruins to Round-the-Clock Operations

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit United States Air Force, Public domain. American B-29 Superfortresses hammered Tachikawa in April and June 1945, reducing the airfield to rubble. The Shintentai, an anti-aircraft kamikaze unit, defended the facilities but could not prevent the destruction. When U.S. forces arrived on September 5, 1945, they found an ai...

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Image: United States Air Force | Public domain

Tachikawa Airfield: Tokyo's Secret Bunker City: The Sunagawa Struggle

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit ブルーノ・プラス, CC BY-SA 4.0. The 1953 air disaster underscored Tachikawa's fundamental problem: the runway was too short for heavy jet-age transports. The U.S. military proposed extending it into the neighboring farming town of Sunagawa. On July 8, 1957, farmers, students, and labor activists clashed with po...

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Image: ブルーノ・プラス | CC BY-SA 4.0

Tachikawa Airfield: Tokyo's Secret Bunker City: Cherry Blossoms Over the Bunkers

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit ブルーノ・プラス, CC BY-SA 4.0. Walk through Tachikawa today and you would never guess the ground beneath your feet holds a small underground city. The central portion of the old airfield is now Showa Memorial Park, a verdant expanse opened in 1983 and named for Emperor Hirohito. Cherry trees bloom where transp...

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Image: ブルーノ・プラス | CC BY-SA 4.0

Tachikawa Airfield: Tokyo's Secret Bunker City: Three Flags, One Runway

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit Josephus37, CC BY-SA 4.0. Tachikawa has served under three flags in a single century. It began as an Imperial Guard aviation outpost, became one of America's most critical Cold War logistics bases, and now functions as Japan's emergency nerve center. The annual Tachikawa Air Show still fills the sky with ...

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Image: Josephus37 | CC BY-SA 4.0