I just want to chime in here: seishein(full time permanent) workers over here get a lot of protection mandated by law. For example if my company closes, they have to pay me 3 months of my salary while I find a new job, and I'm quite difficult to fire.
Infact one of the old chef's just stopped turning up and said I needed a break, they had to pay him 3 months salary still.
Edit for more info:
That is why there has been a huge reduction in the past 10 years (this is anecdotal evidence I have heard by word of mouth), of hiring staff as seishein.
One school I worked at refused to put staff on as seishein, then myself and a few others left due to this, and they changed their practices.
Infact one of the old chef's just stopped turning up and said I needed a break, they had to pay him 3 months salary still.
Edit for more info:
That is why there has been a huge reduction in the past 10 years (this is anecdotal evidence I have heard by word of mouth), of hiring staff as seishein.
One school I worked at refused to put staff on as seishein, then myself and a few others left due to this, and they changed their practices.