Koto City Office:
phone number, opening hours and address
The main phone number of the Koto City Office is 03-3647-9111. Here is what to know before you call, with the address, opening hours and official website.
Koto City Office main line
Official website www.city.koto.lg.jp
Without hyphens: 0336479111
The main number connects you to an operator, who will put you through to the right section. Calls are usually answered in Japanese.
Checked against the official website · October 7, 2026
ABOUT
About Koto City
Koto City was established in 1947 by merging Fukagawa and Joto wards. Old downtown neighborhoods such as Fukagawa and Monzen-nakacho sit alongside new waterfront districts such as Toyosu and Ariake, and the population has risen sharply in recent years. The city office is in Toyo, near Toyocho Station.
BASIC INFO
Basic information
- Main phone
- 03-3647-9111
- Address
- 〒135-8383 東京都江東区東陽4丁目11番28号Shown in Japanese so you can paste it into a map app or show it to a taxi driver.
- Opening hours
- Weekdays 8:30–17:00 (some counters until 19:00 on Wednesdays)Closed on weekends, public holidays and Dec 29 – Jan 3
- Official website
- www.city.koto.lg.jp
- Local government code
- 131083Tokyo 23 Special Wards · Special ward
ACCESS
Access and map
Address
〒135-8383 東京都江東区東陽4丁目11番28号
RELATED OFFICES
Phone numbers of related government offices
Public offices in charge of this municipality (national and prefectural branches). National taxes — income tax and consumption tax returns, tax certificates — are handled by the tax office, not the municipal office. Addresses are shown in Japanese.
- 03-3685-6311
〒136-8505 東京都江東区亀戸2丁目17番8号
Part of this municipality is covered by a different office. Check the agency's official website for your address.
- 03-3633-6211
〒135-8311 東京都江東区猿江2丁目16番12号
Part of this municipality is covered by a different office. Check the agency's official website for your address.
- 03-3683-1231
〒136-8525 東京都江東区亀戸5-16-9
Personal pension consultations are accepted at any pension office in Japan.
- 03-3643-8609
〒135-8609 東京都江東区木場2-13-19
Covers Edogawa City as well as Koto City
- 03-3647-5855
〒135-0016 東京都江東区東陽2-1-1
FAQ
Frequently asked questions
What is the phone number of the Koto City Office?
The main phone number of the Koto City Office is 03-3647-9111. It connects you to an operator, who will transfer you to the right section once you explain what you need.
What are the opening hours of the Koto City Office? What time does it open and close?
Opening hours of the Koto City Office: Weekdays 8:30–17:00 (some counters until 19:00 on Wednesdays). It is closed on Saturdays, Sundays, public holidays and over the New Year break (Dec 29 – Jan 3). Hours can differ by counter and service, so please check the official website for details.
Can I call the Koto City Office on weekends or at night?
The main line is generally not answered outside opening hours. For non-urgent procedures and certificates you may be able to use online applications on the official website (https://www.city.koto.lg.jp/) or the Mynaportal. Check the official website for any weekend service counters.
Which tax office and pension office cover the Koto City Office?
Koto City is split between several tax offices: Koto-Higashi Tax Office (03-3685-6311), Koto-Nishi Tax Office (03-3633-6211). Check the National Tax Agency page to find the office for your address. Pension matters are handled by Koto Pension Office (03-3683-1231).
GOVERNMENT OFFICES
Phone numbers of tax offices, pension offices, Hello Work and public health centers
Main phone numbers, addresses and jurisdictions of the offices in Tokyo.
NEARBY
Other municipalities in 23 Special Wards, Tokyo
For staff of municipalities and public offices
We accept requests to correct or update the phone numbers, office hours, addresses and other details listed here. We check each request against the official website before updating.
The phone numbers, addresses and opening hours on this page are based on information published on each municipality's official website (last checked: October 7, 2026). Please check the official website for the latest information. This page compiles public information for the convenience of residents and does not indicate any business or partnership relationship between the listed municipalities and AIRI (LIVERUSH Co., Ltd.). If you find an error, please let us know via our contact form.
Tax office names, addresses, phone numbers and jurisdictions are based on the National Tax Agency's 税務署の所在地などを知りたい方 (checked October 19, 2026). Pension office names, addresses, phone numbers and jurisdictions are based on the Japan Pension Service's 年金事務所管轄区域 (checked October 19, 2026). Hello Work (public employment office) names, addresses, phone numbers and jurisdictions are based on the Ministry of Health, Labour and Welfare's 全国ハローワーク所在案内 (checked October 19, 2026). Public health center names, addresses, phone numbers and jurisdictions are based on the Ministry of Health, Labour and Welfare's 保健所管轄区域案内 (checked October 19, 2026).