Yeah, no shit.

If I wasn't so sickened by the complete disregard for a student's feelings/wellbeing/safety/dignity/human-fucking-rights, I would probabily have a good laugh at this idiotic asshole's stupidity.

Sorry. Had to rant.

They're all at fault. And actually, yes, teachers jobs are thusly:

To teach students, according to policy, as well as care for the welfare and security of their wards during school-time. This was during school time. Therefore, they ARE responsible for it.

After school-time, technically it falls under school grounds until the student is at his or her's home, apartment complex, or shanty, wherever they may live. Then it is no longer the school's responsibility.

You aren't seeing reality. You're seeing your own version of reality that is incorrect from company policy as well as reality. Now, the Japanese teachers are by no means saintly; to even pretend they are is to ignore reality.

They are still however responsible for their wellbeing, which in some cases, is subjective. Legally, they are obligated to make sure the children are not dead while on school grounds. This is obviously not terribly enforceable, as children die on school grounds a lot. You can't help that, sometimes shit happens.

They're still legally responsible for their general safety, moreso when a child comes to them seeking help because of bullying. Whether they respond to it or not is irrelevant; legally, they're still responsible. Japan's legal system might be different, but elsewhere, this is generally what it entails.

A teacher's job, then, while school is in session to: teach responsibly, adequately and within company policy, to ensure the safety and welfare of his or her children, and to watch over and make sure explicit school rules are not broken, such as dress codes, smoking, etc.

They don't have to be saints, no, but legally speaking, welfare and safety is one of their jobs. You're taking the 'teaching' part quite a bit too literally; to get the truth, you have to actually read sometime.

Give the molding of future to assholes, and see what happens.

Oh, wait, they've already done that. Look at where Japan is now, and where it seems to be quite clearly headed. Look at the frequency of these sorts of events.

You, good sir, are a mentally deficient fucktart of the highest order if you believe that a teacher's job is only "to teach".

New Jersey is fucking amazing. I should know.

Leave it to Japan to have Teachers being worse than police and politicians.

Are the Japanese that desperate to avoid responsibility and stay in denial?