As for the mizansho (female tree) without spines, Asakura sansho, which is native to Asakura Yoka-cho, Yabu City, Hyogo Prefecture, is famous, but sansho without spines are cultivated throughout the country.
棘のない実山椒（雌木）として兵庫県養父市八鹿町朝倉（市町村合併前は八鹿町朝倉）地方原産の朝倉山椒が有名だが日本各地に棘のない山椒の栽培が見られる。