tonkatsu

As nouns the difference between japanese and tonkatsu

is that japanese is a person living in or coming from Japan, or of Japanese ancestry while tonkatsu is a popular Japanese dish consisting of a breaded, deep-fried pork cutlet served in bite-sized pieces and often accompanied by shredded cabbage and miso soup.

As an adjective Japanese

is of, relating to, or derived from Japan, its language, or culture.

As a proper noun Japanese

is the main language spoken in Japan.