The Name Yamashita Treasures refers to those treasures hidden by the Japanese in the Philippines during their occupation during WW2.
Some apparently found, many apparently still not. Food for thought....
Links: http://www.yamashitatreasures.com/ - (Warning: Site is a bit dodgy looking, use discretion when viewing.), http://www.spi.com.sg/spi_files/shinto_shrine/secrets_of_shinto.htm, Google Search for Yamashita Treasures