After not looking at the game's leaderboard since early 2021, I saw that the full game run is done on the Japanese version. I was confused when I saw about 5 minutes and noticed the game's events are near entirely different considering needing to go around town for the police ID (let alone the town having a somewhat different layout). Plus starting cash in the us version is 7k instead of 12k. Is there a separate leaderboard for the American release of the game?

Currently there is no U.S. version of the leaderboard. I have never played the US version, so I don't know which events are different and by how much, so I don't know how it affects my time. So I can't judge whether there is a need to separate the leaderboards or not. I'm sorry. In case you are wondering, the first possession in the Japanese version is 7k. (In the RTA video, the police ID event increased the amount by 5k, making it 12k.)