熊剛's twitter handle is takekumax, so it seems more likely his name is read as Takeshi Kuma or Takeru Kuma rather than Tsuyoshi Kuma. I've reverted the name back to kanji since I couldn't find a source confirming one or the other.
Edit: Apparently Takeshi Kuma is the correct reading
https://i.ebayimg.com/images/g/hx0AA...QS/s-l1600.jpg
Credited as Takeshi Kuma on Cafe SQ as well
https://vgmdb.net/db/covers.php?do=view&cover=132903