World Dirt Association is an artist collective founded by James Jack, Shotaro Yoshino and Yoshitaka Nanjo in 2014 based on their shared concern for dirt. Exhibitions include Water and Land Festival Niigata 2015, SYP Art Space 2016 in Tokyo, Art x Mix Ichihara 2017 in Chiba, Yame Remix 2017 in Fukuoka and Oku Noto Triennale 2021 in Ishikawa.