Riyakou comments

The New Zealand family have a case to answer themselves by allowing their bi-polar/schizophrenic relative travel to Japan in the first place. Yeah it's not in the article what mental problem he had but let's call a spade a spade.

I knew this man personally as he lived near me. He was happy and loved his students. It had been his dream to come to Japan for ages. Just because you have a mental illness doesn't mean you shouldnt carry out your dreams. He thought it'd be okay if he stopped taking his meds and when they didnt, he was courageous enough to seek help out. It was the bad Japanese health care that did this. He wasn't dangerous or violent.

Possible suicide or driver falling asleep at the wheel.