本吉町是位于日本宫城县东北部，面向太平洋的一町。2009年9月1日，编入气仙沼市。

Motoyoshi(本吉町,Motoyoshi-chō) was a town located in Motoyoshi District, Miyagi Prefecture, Japan.

In 2003, the town had an estimated population of 11,716 and a population density of 109.80 persons per km². The total area was 106.70 km².

Motoyoshi was divided into four districts: Magome, Koizumi, Tsuya, and Ohya. Koizumi and Ohya were both home to spectacular beaches until the disaster of March 11. Tsuya constitutes "downtown" Motoyoshi. Fishing and farming are the main industries though a printing company is also a large local employer. Motoyoshi, like many of Japan's smaller towns, had a declining population as young people increasingly moved to the large regional cities of Kesennuma and Sendai, or further South to Tokyo.