Iwafuji 【岩藤】5 The Japanese surnames etymology dictionary.
Aichi-ken , Toyama-ken Tonami-shi . Distribution including Gyuko. Thing . At Toyama-ken Ishikawa-ken Kahoku-gun Tsubata-machi · Toyama-ken Okinawan-shi 's Kutashara River Pass was in 1183 (7 years of honorning · 2 years of sutanaga ) which was in the battle of Kusashara Rama Pass There is a tradition that it may be from lending. There is also a story that Toyama-ken went out to Kyouto-fu and changed pronunciation from Guyco to Ushiko. Estimated in the Tokyo era.