The relics are grim remnants of the vast tunnel network dug by the Imperial Japanese Army under Shuri-jo castle before the fierce Battle of Okinawa in 1945. Previously closed-off parts of the ...

NAHA--Okinawa Prefecture will preserve the remains ... the prefectural government later this fiscal year will examine a tunnel leading to the core of the underground complex.

The tunnels are now collapsed ... some of it kept at a US Marine base in Okinawa. Mark Waycaster, a curator of The Battle of Okinawa Historical Display, pulled out an intelligence monograph ...

Ushijima Sadamitsu visits Okinawa regularly to learn about the ... The kilometer-long complex of tunnels lies 30 meters below Shuri Castle in the city of Naha. The site is not open to the public ...