The Koto Pension Office (江東年金事務所) is the Japan Pension Service office for employees' pension and, for Kyokai Kenpo members, health insurance.
Jurisdiction
What employers file here
- Social insurance registration (新規適用届) when the company starts: every corporation paying even one person must join
- Enrolment (資格取得届) within 5 days of each hire, and loss of status (資格喪失届) within 5 days of leaving
- The annual earnings report (算定基礎届) by 10 July
- Notice of a large pay change (月額変更届) and bonus payment report (賞与支払届, within 5 days)
- Large companies must file these online through e-Gov
Questions
Which areas does the Koto Pension Office cover?
Koto (Tokyo).
What is the address and phone number of the Koto Pension Office?
5-16-9 Kameido, Koto-ku, Tokyo; phone 03-3683-1231.
What do employers file at the Koto Pension Office?
Social insurance registration (新規適用届) when the company starts: every corporation paying even one person must join. Enrolment (資格取得届) within 5 days of each hire, and loss of status (資格喪失届) within 5 days of leaving. The annual earnings report (算定基礎届) by 10 July. Notice of a large pay change (月額変更届) and bonus payment report (賞与支払届, within 5 days). Large companies must file these online through e-Gov.
Jurisdictions checked against each office's official site on 21 October 2026. Offices merge and move: confirm on the official page before you file.