Hoba-zushi is not only good for being carried and preserved because leaves of magnolia and vinegar rice have antibiotic effects but also convenient as a meal served when neighbors gather to work, therefore, it is considered that Hoba-zushi spread among the people.
その為、携帯性が良く朴の葉と酢飯の殺菌効果で日持ちし、また近隣との作業の助け合いでまかないにも便利な朴葉寿司が広まったと考えられる。