The grave of Hoshina Masayuki is located in Inawashiro within the grounds of , a Shinto shrine. The stone monument is 7.3 meters tall, and is inscribed with his biography in the calligraphy of Yamazaki Ansai. Masayuki was a fervent follower of Shintoism, and this shrine was established in 1675 two years before Masayuki's death to be his final resting place and as a subsidiary shrine to the kami of Mount Bandai. Although the Tokugawa shogunate had decreed that all funeral rites were to be held per Buddhist rituals, the Aizu-Wakamatsu clan remained an exception throughout its existence. The honden of the Onitsu Jinja was originally in the flamboyant Mooyama style, similar to the Nikkō Tōshō-gū, but was burned down during the Boshin War.