Star of Destiny(1966)

"She's out there somewhere, well and alive." Eiji (Teruhiko Saigo) and his sister hadn't seen their mother in almost 20 years. The war had separated them. When Eiji learns that his sister is engaged, he is determined to reunite with his mother and relay the wonderful news. With a pocket full of hopes and just one clue that may lead him to his mother, Eiji sets off for Taiwan.