The entrance to the cave in Kagoshima City where four 13-year-old boys were found dead April 9

They found three air guns, numerous plastic air-gun bullets, five lighters and three utility knives in backpacks and pouches recovered from the cave, which is believed to be an old air raid shelter.

The cave has been often used by junior high school students to test each other's courage, local school officials said, adding they learned about it after talking with students about the incident.

The bodies of Mizuki Nakano, Kazuki Moi, Satoshi Jitozono and Koshiro Kawagoe -- all students at Takeoka Junior High School and members of the school tennis club -- were found in the cave April 9.

The Japan Times Weekly: April 16, 2005
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