In case you missed this:
The problem of hot cabins and the sensation of coldness has been discussed at length in the past. Any temperature over 78 degrees and the DRY air decreases the exchange of Blood levels of Oxygen & Carbon Dioxide in the lowered pressure cabins resulting in shortness of breath, headache, anxious feelings, etc.
R&R, you keep assuming that Japanese people (and more specifically Japanese scientists) agree with these findings. Most likely, the vast majority of Japanese people have never heard of this and would probably just disagree or claim that Japanese people are different...
I am not trying to validate their claims so much as explain that there's a cultural difference at work here, and you're assuming there's a fact of the matter that Japanese people would accept and alter their behavior for.