Zakko refers to groups of technical experts mainly from handicraft industry, coming from shokugyobe (professional Be [groups of people who belonged to the Yamato Dynasty]) subordinated to specific government offices under the ritsuryo system (a system of centralized government based on the ritsuryo code) of Japan before the Taika Reforms.
雑戸（ざっこ）とは、日本の律令制において特定の官司に隷属していた大化前代の職業部に由来する手工業を中心とした技術を持つ集団のこと。