There were Japaneseicon artifact with the bones, coins, buttons one round of 7.7mm ect. No weapons or filed gear in the section we excavated which was only about 4x5 feet. There were other remains beyond this area that may have held more artifacts. I think these guys were KIA in thier foxhole/fighting position, left as they fell and just covered over. Other parts of the island did have mass burials involving bulldozers. There are still 3,500+ Japanese on the island in various spots.