My Dad told me that the Japanese would come out of the jungles to surrender to them because they were starving to death. They had already eaten every monkey and dog on the island, and the SeaBees would feed as many as they could, but had to turn most away. They had no place or provisions to take them as prisoners. This was one of the saddest effects of the war in Guam..He told me that when they were doing the dirt work to prepare the landing strips, they were being shot at, almost on a continual basis. However, the longer they worked, the less the shooting, so I suppose that is when the Japanese gave up (theoretically)...
My grandfather (actually grandmother would tell us through his letters and newspaper clippings) told of the same incidents of Japanese interaction. Also remember my grandma telling us he had a hard time getting boots since they extended supply lines and the Japanese were frequently too small. He refused to take boots from American soldiers