As hopes of finding survivors faded, anguished relatives of the nine Japanese missing after a surfacing U.S. submarine sank their trawler off Hawaii pleaded to have the wreck raised so they could discover if it was the tomb of their loved ones. The request -- also being pushed strongly by the Japanese government -- was forwarded to top U.S. government officials, but a key investigator said he saw no reason at present to recover the 499-ton Ehime Maru from its watery grave 1,800 ft. (548 m) below the ocean surface. Addressing reporters on Sunday night for the first time since arriving in Hawaii, National Transportation Safety Board investigator John Hammerschmidt said he did not believe it was necessary to bring the ship up to discover accident details…