| In 1744, Kanshiro ITAGAKI, who served as the guardian of the mountains at Amagiyugashima (Izu City), visited Utogi at the behest of Mishima's local governor for the purpose of teaching the technique of shiitake mushroom cultivation. |
延享元年（1744年）、天城湯ヶ島（現伊豆市）で山守を務めていた板垣勘四郎は三島代官の命によりシイタケ栽培の技術指導で有東木を訪れた。 |