The Japanese Company

I am still getting used to working for a Japanese company. Twice in the last month I have had to go in for training on my day off and instead of paying overtime for such days, they promise that you can get the time off "in lieu", which basically means you can get another day off for what you worked. Last week I put in a form to get my day off in lieu, and finally this week I got the form back saying that the 19th was not possible, could I please take the 5th instead. I guess I am just not used to having my holidays dictated to me. I have learned that the average Japanese businessman works 50 hours overtime a week (that is PLUS the 40 regular!), which might make sense to me if you really needed the money, but in fact they are paid a salary and don't make more for overtime hours worked. It is all done to look good, and for the opportunity of moving up in the company. Now that is dedication! I guess if I look at my situation in the greater scheme of things, it isn't so bad.