浅川地下壕, Underground military complex in Hachioji, Japan
The Asakawa Tunnel network is an underground military complex built beneath Mount Konpira in Hachioji. The facility features multiple chambers and passages that remain intact and open to visitors today.
Construction began in 1944 as a protected facility for aircraft production during World War Two. The project involved extensive labor and reflects a key chapter in wartime industrial operations.
Local preservation groups organize guided tours to educate visitors about the wartime industrial activities and labor conditions in these underground facilities.
Visits should be arranged in advance through local preservation groups, and you will need to bring a flashlight, gloves, and sturdy footwear. The underground environment is cool and damp, so wearing appropriate clothing is advisable.
The site houses seismic monitoring equipment from a university research station that can be viewed during guided tours. This scientific use shows how wartime ruins were later repurposed for different research activities.
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