Lump-sum Withdrawal Payments (Exclusively for Non-Japanese Citizens)
If you are not a Japanese citizen and you had resided in Japan and had been covered by the Japanese system for a short time, you can claim the Payments within two years after your departure from Japan. You can claim the Payments if you have at least 6 months of due coverage periods under the National Pension system (contribution-exempted periods are proportionally calculated) and you are not eligible for pension benefits.
Please refer to the “Lump-sum Withdrawal Payments” details / application form in English, Chinese, Korean, Portuguese, Spanish, Indonesian, Tagalog, Thai, Vietnamese, Myanmar and Khmer.
Read more below
https://www.nenkin.go.jp/
