I mean this in a good way, the announcer for most of the Japanese fights I've seen sounds the same. Is there a Japanese Michael Buffer that does the ring introductions?
Most Japanese fights you're likely to see come from Tokyo, so they will likely have the same guy. When you look at the other local scenes (say Osaka, Kobe, Nagoya) you'd see others. I'll be honest I think there's only really 2 guys that do the TV shows in Tokyo, one has short hair and looks old, and then there's a younger guy with hair. Thailand is quite similar, with an older bloke we see a lot on Channel 7 shows. Wouldn't know their names though, sadly