some were found in deep dry tunnels and others in purpose made concrete structures, Japanese emplacements and living areas in tunnels....also
tunnels on Okinawa and Saipan then down to New Guinea,
and i dont joke, there is enough stuff along that route it would take you years to sort it out...
from a whole plane to bits like mine..
and the really strange part is, the camera was found at Okinawa but was made in the Philippines....