When Momo transfers the money from the bank in Tokyo to Hubert's account the Bank name reads BDF instead of BFD (Banque Française de Depot, Tokyo) on the Computer Screen.
There is a scene where Hubert tips the bellhop. Tipping is not customary in Japan, and unless they have worked with Westerners for a long time, most Japanese feel uncomfortable receiving gratuities.
Yakuza member leaps at Hubert at the bank and Hubert shoots him, but the effect of the gun doesn't show blood, revealing some kind of material exploding, simulating the bullet impact.
Shadow of equipment (presumably the camera) visible as camera pans forward in the club during the opening. Watch the floor.
After arriving in Tokyo, Hubert asks Momo to drive him to Shinjuku district to meet the lawyer. However, the following scene shows Hubert getting out of the car at Akihabara (the famous electronics shopping district) which is on the other side of Tokyo. This is evident by the iconic Akihabara pedestrian crossing under the green train bridge where he gets off. Later on, Hubert again leaves "Shinjuku" from what is clearly Akihabara and its electronics shops in the background.