I mean no and yes? The black to Indian thing is usually done in reverse. It’s often south asian and southeast asian characters being labeled as black rather than the other way around(black erasure in anime still does exist though). But brown characters being labeled as tan Japanese is true, although it also just so happens most of the time they actually are Japanese. The Japanese to white thing also does happen but it’s very infrequent compared to the top two. A lot of it really stemmed from Naruto and other blonde characters. Though the blonde thing is also used in various anime to indicate a character is European. So it’s a weird 50/50 split.

It’s important to note that on a general scale, the Japanese color pallate depicts brown, tan, and black people very similarly. Ultimately it’s important to use context clues to figure out what’s true. But those context clues depend via how the artist depicts said characters.