[jasonbvr]

The part about changing jobs is not necessarily true if you work for a legitimate employer. This is because the different types of visas qualify you for different types of work. Even between those working eikaiwas and as ALTs there is usually a difference. ALTs are under instructor visas versus the specialist in humanities for eikaiwas. That being said, a lot of people, even some immigration officials, are not aware of the difference.

Then you have the idea of just bailing on your employer. Most employers set pay dates at least ten days into the new month. This means if you bail on them, you leave behind about 1,000 USD in uncollected wages. Some companies even post their employees salaries as late as the 25th for the previous month of work. You would have to really dislike your job to leave behind a full month of pay.

I think the point trying to be argued was that unlike in Korea if you dislike or need to leave your job the police in Japan will not come after you. If you bail on an employer in Korea, they will flag your visa so that they try to catch you at the airport. Then they will bring you back to your employer in handcuffs to either resolve the dispute or have the employer release you from the visa.