After several years studying food processing in Uwajima, he emigrated to the United States in 1923.
At first, he sold homemade fishcakes and various cuisines regarding seafood to several Japanese Americans from the back of his truck.
There, Moriguchi, with the money he borrowed from friends and former customers of Uwajimaya, bought a small building on South Main Street in Seattle's Japantown where he re-established his business in 1946.
[7] In 1962, Uwajimaya made exhibitions by opening their own gift shop at the Century 21 Exposition.
[8] That same year in August, Moriguchi died at the age of 64, leaving his business to his four sons, Kenzo, Tomio, Akira, and Toshikatsu.