During the Tenmon era (A.D. 1532 - 1555), so-kuji was imposed also on the growing aoso-producing areas, such as Kai Province (the present Yamanashi Prefecture) and Shinano Province (almost the same area as that covered by the present Nagano Prefecture).
天文(日本)年間には甲斐国・信濃国など新興の青苧産地からの青苧にも苧公事を賦課している。