Koga City Office:
phone number, opening hours and address
The main phone number of the Koga City Office is 0280-92-3111. Here is what to know before you call, with the address, opening hours and official website.
Koga City Office main line
Official website www.city.ibaraki-koga.lg.jp
Without hyphens: 0280923111
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 Koga City
Koga City was established in 2005 by merging the former Koga City with the towns of Sowa and Sanwa. During the Sengoku period it was the base of the Koga kubo, and in the Edo period it prospered as the castle town of the Koga Domain and a post town on the Nikko Kaido. The city office divides its departments among three buildings, and the Sowa Building is in Shimoono.
BASIC INFO
Basic information
- Main phone
- 0280-92-3111
- Address
- 〒306-0291 茨城県古河市下大野2248番地Shown in Japanese so you can paste it into a map app or show it to a taxi driver.
- Opening hours
- Weekdays 8:30–17:15Closed on weekends, public holidays and Dec 29 – Jan 3
- Official website
- www.city.ibaraki-koga.lg.jp
- Local government code
- 082040Ibaraki Western Area · City
ACCESS
Access and map
Address
〒306-0291 茨城県古河市下大野2248番地
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.
- 0280-32-4161
〒306-8686 茨城県古河市北町5番2号
Covers Bando City, Goka Town, Sakai Town as well as Koga City
- 0296-25-0829
〒308-8520 茨城県筑西市菅谷1720
Covers Yuki City, Shimotsuma City, Joso City, Chikusei City, Bando City, Sakuragawa City, Yachiyo Town, Goka Town, Sakai Town as well as Koga City
Personal pension consultations are accepted at any pension office in Japan.
- 0280-32-0461
〒306-0235 茨城県古河市下辺見2099 古河労働総合庁舎1階2階
Covers Goka Town, Sakai Town as well as Koga City
- 0280-32-3021
〒306-0005 茨城県古河市北町6-22
Covers Bando City, Goka Town, Sakai Town as well as Koga City
FAQ
Frequently asked questions
What is the phone number of the Koga City Office?
The main phone number of the Koga City Office is 0280-92-3111. 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 Koga City Office? What time does it open and close?
Opening hours of the Koga City Office: Weekdays 8:30–17:15. 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 Koga 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.ibaraki-koga.lg.jp/) or the Mynaportal. Check the official website for any weekend service counters.
Which tax office and pension office cover the Koga City Office?
Koga City is covered by the Koga Tax Office (0280-32-4161). It handles national taxes such as income tax and consumption tax returns and tax certificates. Pension matters are handled by Shimodate Pension Office (0296-25-0829); personal consultations are accepted at any pension office in Japan.
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 Ibaraki.
NEARBY
Other municipalities in Western Area, Ibaraki
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).