Kaneka is the leading source of Ubiquinol version of CoQ10 was developed in Japan not China.
Kaneka has a 47 acre campus industrial center in Texas and probably makes a lot of their Ubiquinol there. When looking at labels on all brands of Ubiquinol many if not most of them used the trade mark Kaneka brand.
It is scientifically well established that Ubiquinol is far more bioavailable/bioactive version of CoQ10 than Ubiquinone CoQ10. CoQ10 is regenerative in humans (as well as many other animals) and when we age we loose the ability to regenerate ubiquinone into the bioactive form ubiquinol. https://ubiquinol.org/clinical-studies