This character is on the label of a riceball sold at 7-11 in Taipei. I believe this kind of riceball is originally Japanese.
It seems to be some kind of variant of 糰 / 团 but is actually composed of 米 on the left plus 団 on the right. But I can't find it anywhere on the Internet or in Unicode so far.
Is it a known variant, or is it possibly normally considered a Japanese character? On Wiktionary, 団 is listed only as a Japanese shinjitai character. (Shinjitai is a simplified character made in Japan.)
Or maybe it's some kind of fake character made up by 7-11, like a trademark?