Lump-sum Withdrawal Payment from Employees' Pension Insurance
To receive a lump-sum withdrawal payment from Employees' Pension Insurance, you must meet all of the following conditions: you do not hold Japanese nationality, you are no longer enrolled as an insured person, you have been enrolled for at least 6 months, and you do not meet the 10-year qualification period required to receive an old-age pension. The payment amount is calculated based on the average standard monthly remuneration during your enrollment period and the applicable payment rate. From April 2021, the upper limit on the number of months used in the calculation was raised to 60 months.
Source
日本年金機構
This information is reference material based on official announcements. Always verify accurate information on official websites or with relevant authorities.