Japan has not to my knowledge ever had a heavyweight kickboxing world champ. The history of the Heavyweight Kickboxing champion has throughout it been heavily dominated by the Dutch. For example, Semmy Shilt, Ernesto Hoost, Peter Aerts, Rico Verhoeven, perhaps the 4 guys who could lay claim to greatest heavyweight kickboxer of all time of all time, are all Dutch. Countless of the current top heavyweight fighters train in the Netherlands, Jamal Ben Saddik included. I do not follow the light weight kick boxing scene at all but I do tend to notice that there are many Japanese fighters in those divisions. The thing is, you would be very hard pressed to find any number of Dutch guys who weigh 60kg for example, given the average height is around 6 foot, letalone 50kg or however light the divisons go. It kind of makes sense there are more Japanese fighters in those very light weight divisions because they are a naturally smaller sized human, especially as compared to the Dutch. The same is true in MMA, where in the UFC for example, there have been relatively few Japanese light heavyweight fighters, and virtually no Japanese heavyweight fighters. Even in the Pride days it was the same, the rare Japanese heavyweight was something of an oddity, for example Fujita, or Takayama.I feel like Japan has surpassed them. Rico is the only Dutch champion left.