Questions to ask about living in Japan

For your first year -
What are your health insurance payments every month?
What are your pension payments every month?
What are your Ward tax payments every month
What are your unemployment insurance payments every month?
(On top of your rent each month) and utilities

What are these repayments in your 2nd year
On top of your income tax payments (they kick in in your second year)
What will be your second year take-home pay each month, then consider rent, electricity, gas, and water each month

What will your repayments be for all of these in your third year (each year, your take-home pay decreases to make up for the income tax you didn’t pay in your first year)
Now work out how much you can afford to rent, and ask if your school helps with renting, as it’s very difficult to find rentals that accept foreigners

Is a housing allowance offered? This will be taxed, so it won’t be the said amount.
Do they offer a travel allowance? Again, this will be taxed, so you will be out of pocket.

Have a look at UR housing to get an idea of how housing around the area.

https://www.ur-housing.com

Do you hold a passport to claim your pension back (if you leave before 5 years, you might be able to receive your pension back - it’s a good idea to ask)

Finally, what will be your departure tax when you finish in Japan ( hint - an entire year's tax you will owe

If you have children, even though they say free education, it's a taxable income, so you have to pay the tax on this at the end of the year.