Leaving Japan
Note that leaving on or after January 1st make you liable to pay the resident tax for the previous year. Leaving on Dec 31st or before make you exempt on that year resident tax.
Closing bank account
2023-01 Closing your bank account and receiving last paycheck
Tax procedures
See this brochure made by the NTA about tax procedures when leaving Japan.
Exit tax
When losing Japan Tax residency with qualifying worldwide assets worth 100M JPY or more, you may be subject to an exit tax. Please see the Other Taxes page.