Ishiwata Shoten was established in 1957 in Kesennuma, Miyagi prefecture. The company has led a long history as a shark fin specialty store, ranging from market purchase to the manufacturing and sales. Its products are known for their refined quality, and have even been presented as a meal to the Emperor upon his accession. Ishiwata Shoten faced severe damage from the great tsunami in 2011. However, in the following year, it swiftly resumed its production and distribution. Since then, Ishiwata Shoten has been developing new products such as oyster sauce and XO sauce using fully matured oysters from the Karakuwa peninsula of Kesennuma.