commin is a free contact network that is ideal as a contact tool for schools, PTAs, circles, family and friends.
Since it can be used as a contact network that connects only to specific people, it is also ideal as a contact network for PTA, schools, cram schools, and lessons.
Chat / Contact Network / Schedule Adjustment / Calendar Sharing / Photo Sharing / Safety Confirmation / Questionnaire ... etc. You can do various communications easily.