If you never heard about the weight maintenance company wide competitions (let's fitness!), the labor doctor telling you that it might be difficult for you to handle stressful management work with high blood pressure, the kids saying that they were laughed at because their dad is fat...

You're blessed.

None of these are even remotely unique or attributable to Japan. You can find them anywhere in the developed world.

I can't tell if you are speaking from experience or not. I tried googling about this company wide competition and cant find any hits about this, searched "lets fitness" in english and Japanese, cant find anything.

High blood pressure is a medical condition, and you are telling me that a suggestion from the doctor regarding stress levels at work is bad?

And kids, cmon. Kids will make fun of anything. I did some schooling in the US and I was made fun of purely for being of a particular race.