It appeared that the Red Dead Redemption 2 is censored in Japan. Some violent scenes and gameplay mechanics in the game were seen to be slightly softened for the Japan version of the game. Censored Gaming's Youtube channel has uploaded a comparative demonstration of the censorship applied to the Japanese version of Red Dead Redemption 2. You can watch how the Red Dead Redemption 2 is changed because of the censorship from the following player.
Censorship to Japan version of Red Dead Redemption 2
Some games’ content may vary from country to country, region to region. We saw the censorship to Rainbow Six Siege’s China version recently similar to this situation. Last month, we saw a censorship in the release of Assassin's Creed: Odyssey in the Arab region. The "private" areas of the Zeus statue in the game were covered up with leaves. Another censorship news came from the Japanese version of Red Dead Redemption 2. Some of the scenes in the game such as the disintegration of dying NPC’s bodies, seeing internal organs of them etc. was seen to change in the Japanese version.