This is the 4560th most frequent Japanese word.
年金
Pension.
In this sentence, "年金" refers to the financial allowance issued to individuals after retirement (retirement pension).
彼は退職後に年金を受給しています。
He receives a pension after retiring.
Here, "年金" is used in the context of a national pension system or scheme.
日本の年金制度は複雑な仕組みがあります。
Japan's pension system has a complex structure.
In this instance, "年金" refers to personal savings or investment towards one's future retirement funds.