It seems to be something of a stretch for Deputy Dawg, a character based in the rural United States, to be presenting the adventures of an angry Japanese mouse.

The issue also contains a Clint Clobber comic.

Hashimoto's Wikipedia page says:

Since it was common to portray Japanese and other Asians as houseboys or manservants (or worse) in American cartoons prior to the Hashimoto series, Hashimoto the Mouse is today regarded as having perhaps been the first positive characterization of an Asian character in American animation.

The animator, Bob Kuwahara, didn't live long enough to see this comic.