I guess many foreigners would like to know this.
Especially for those who had worked in Japan for several years and now have prepared to leave Japan, this is an important topic since it is about getting money back.
I was one of them.
I paid for Kosei pension insurance to Japan government every month during my 5-year work in Japan, which is very much like donating to Japanese government.
Although pension usually means that you can get money after retirement, as a foreigner without any guarantee for visa after retirement, it’s much more as donation than pension insurance.
As a result, I wanted to get as much as money back while leaving Japan if I can.
The rule calls the money “Returning money for short-tern residence foreigners”, or “Returning money from ending Kosei pension insurance”.
The amount of returning money can be confirmed at local pension offices.
The rough way to estimate the amount is 3 times of the payment of Kosei pension insurance in the last working year.
For example, if you paid Kosei pension insurance 20,000 yen a month and 100,000 yen from bonus in the last year, you may get 1,320,000 yen back. (20,000*12+100,000*2)*3=1,320,000 yen