In 1942, during World War II, Yamamoto directed "Hawai Mare oki kaisen" (The War at Sea from Hawaii to Malay) at Toho Co., Ltd. (film studio) with Eiji TSUBURAYA as his special effects director.
第二次世界大戦中の1942年、円谷英二が特技監督を務めた『ハワイ・マレー沖海戦』を東宝で制作する。