This is a Nanro puzzle. The first version of this puzzle was made in a period of 60 minutes as part of a “speed-setting” event, but unfortunately, I missed some ambiguities. To fix the ambiguities, I added a number and changed a region shape, as suggested by IHNN. Getting a good balance of “enough clues for the puzzle to be solvable” and “not so many clues it breaks the logic” definitely seems a bit tough in this genre, and doing all this in 60 minutes for a genre I’m not super familiar with is also going to be tough, so honestly there’s a part of me kind of surprised I was able to pull up anything at all.