Joe Tomei here. The 2021 Spring YOKA, a publication of Kumamoto JET program participants is available at
https://kumamotojet.com/documents/YOKAs/2021SpringYOKA.pdf

Back issues are here
https://kumamotojet.com/reiwa/category/yoka/

Thanks to Lily McDermott & Chase Sutherland for allowing me to share it here.