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.)