Japanese are good in making good RPGs

Final Fantasy series
Shining series
Dragon Quest series

Are the Japanese really creative or the Americans are just lack the skills in a good RPG plot?

Most of the things from those games listed were only good for their time. I played final fantasy 1 back in the day and it was fun then.

Japanese are usually only good at making characters that you don't forget and sometimes fun battle systems (twitch or tactical strategy).

The concept of classes, levels, turn-based combat, and experience per kill is rather restricting to be honest.