Hello,
You deleted some volcanoes or changed their tags, did you read the OSM Wiki?

Tag:natural=volcano
https://wiki.openstreetmap.org/wiki/Tag:natural%3Dvolcano

I'll revert some of your changesets later. (#134798457, #134798345, #134798225, #134798188)

Also, the survey points on the Japan GSI Standard Map are not necessarily peaks. Please be careful when editing peaks. (peak = the highest point)
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            Published using OSMCha: https://osmcha.org/changesets/134798345
            