Just Adding to Fratemate's Reply.
The next few courses have 6 on each course. Current plan is 6 courses per year with 8, but they haven't got 8 yet to fill a course yet.
Attitude is EVERYTHING in Japan and is more important than flying skills or even knowledge. If they consider your attitude is excellent then most likely you will get through an upgrade course.
One tip flying the sim on an interview: Don't try and be efficient. I'm not sure what is in the sim notes now but do exactly as it says. For example on a VOR DME approach don't try and fly a constant glide path on descent. If there are check altitudes on the approach then descend to the altitudes, level off, then descend again. Goes against the grain but that is what they want to see.