Three seasons. By watching for, oh, more or less six hours yesterday, I finished off Season Two - Legend of Kyoto. The first 2/3s of that season (which was really, utterly spectacular) are with you. The climax - four hours of straight hard battle - I got yesterday.
The "Well, I'm back" moment was more of a "I'm back, that I am" moment. Same thing, right?
RK has really long seasons - about 32 episodes rather than the usual 24-26. So that almost makes up for the fact that there's only three.