This is a certificate of participation for an event commemorating the release of "ochakai world", co-produced by members of the HENKAKU community. "ochakai world" is a Roblox world based on the theme of Nodate, a tea ceremony to be enjoyed outdoors. It is a virtual space for adults and children alike, including a nodate area, a festival area, and a museum.

This POAP is for those who participated in the event "Environment x web3 2023/6/17" held in the HENKAKU community.

This POAP is for those who participated in the event "Environment x web3 2023/5/20" held in the HENKAKU community.