After 1945, growing ebi-imo rapidly spread in Terabun, Iwata City and the Hirose area of the former Toyooka-mura, which had the same soil conditions, and Iwata city became well-established as a site of ebi-imo production.
昭和20年以降、同じ土壌条件である磐田市寺分、旧豊岡村広瀬地区にも急速に普及し、磐田市は海老芋産地として定着した。