Okumura 【奥村】6 The Japanese surnames etymology dictionary.
① Toyama-ken Nakaniikawa-gun Originated from the mountain of the main peak of Tateyama in Tateyama-machi . Toyama-ken Takaoka-shi Meiji New surname by monk of Chosukukuji of Jodo Shin Buddhism in Shimakino. Tradition in the temple.
③ things . Hyougo-ken Tanba-shi Meiji New Last Name by the Shinto priest of Yawata Shrine in Kashiwabara-cho. The company tells that he used "male", "mountain" from Yama Tokuyama in the mountain name when he left a monk at Kaneda temple Shingon Buddhist priest in the same place due to separation of God Buddha and Buddha in 1868.