This game was developed in Japan by Data East, and then manufactured and distributed in Japan by Taito.

And later the same year, "Sega/Gremlin" (like the flyer says) handled American distribution.

Source of information:

a) (c) DECO inside the game

b) Listed in the official 1980 section of games manufactured/distributed by Taito in Japan.

Mr. Hoffman said it best: I would hate to be a video game lawyer during the 1980's.