It's crazy - I was just writing about developing a similar style kick. I watched some of the videos from the other thread (never really watched K-1, so didn't know Masato) and it appears to be a combination of the MT and the karate style.
A brief summary of what I was noticing and writing about. The difference between the MT and karate style kick is about which foot is primarily used to generate power. In the thai-style, most power seems to be generated by the explosive launching of the kicking leg, with the support leg serving as the axis that you rotate your hips around (turning your hips over serves to ensure proper acceleration and consistent power throughout the technique). In the karate style, the power is generated by the support leg being used to drive the body and kick towards the opponent (the hips are essentially driven straight at the target, all acceleration is linear), and the kicking leg is only raised into kicking/chambered position in preparation for the subsequent support leg motion, it is not driven directly at the opponent until the support leg does so, hence no turning the hip over.
What I see with Masato (and what I going to post at a later date) is a combination of the two. You still push explosively with the kicking leg towards the target, a la the thai style. Only instead of turning the hips over to complete the rotation, you drive forward with the support leg, a la the karate style. The result is that you use both power generating techniques without the "shortcomings" of either. 1) The tendency to over- rotate with the thai style 2) the loss of power from the karate style. As a result, you still achieve the explosive power from the thai kicking leg with needing to turn the hips over for consistent power throughout the kick.
That's probably not the most well-written post of my life so anyone with experience in both styles, I'd like your feed back on explaining the mechanics.