I can imagine people that live here for as little as a few months taking off part of Sunday. Many Japanese work on Saturday as well as the rest of the week and Sunday is a big day for dates. When Hatsumi was teaching from 9-11 on Sunday, leaving right after could mean that you were able to make a lunch date.
But the people that came for only a few weeks and then would take off right after class boggles my mind. I used to have the opposite problem. From where I come from it was hard to make it to class by 9 and so a few times I showed up only for Nagato's class. It blew my mind to see all the gaijin walking in the other direction as I got close to the dojo.
In case anyone is confused by the above, don't be. I am the one that was confused. Hatsumi's classes have always been from 11-1. But Nagato's classes used to go from 2-4. So going to training with both pretty much blew all of Sunday. That can be harsh on a relationship since Sunday is the one day a lot of Japanese have off. Now Nagato starts at 9 and sometimes the Quest guys show up after Hatsumi's class for some filming.
Sorry if this confused people.