noun
pension coverage letter
An annual statement sent by the Japan Pension Service around the insured person's birthday, summarizing pension contributions and projected benefits.
誕生日の頃に年金定期便が届いた。
I received my pension coverage letter around my birthday.
年金定期便で将来の受給見込み額を確認できる。
You can check your projected future pension amount in the pension coverage letter.
Compound of 年金 (pension) + 定期便 (periodic mail).