Kaisei Town Office:
phone number, opening hours and address
The main phone number of the Kaisei Town Office is 0465-83-2331. Here is what to know before you call, with the address, opening hours and official website.
Kaisei Town Office main line
Official website www.town.kaisei.kanagawa.jp
Without hyphens: 0465832331
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 Kaisei Town
Kaisei, a town in Ashigarakami District, was created in 1955 through the merger of the villages of Sakata and Yoshidajima. It is the smallest municipality in the prefecture by area and is known as a “home of hydrangeas.” The town office is in Nobusawa, where it began operating in a new building in 2020.
BASIC INFO
Basic information
- Main phone
- 0465-83-2331
- Address
- 〒258-8502 神奈川県足柄上郡開成町延沢773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.town.kaisei.kanagawa.jp
- Local government code
- 143669Kanagawa Western Area · Town
ACCESS
Access and map
Address
〒258-8502 神奈川県足柄上郡開成町延沢773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.
- 0465-35-4511
〒250-8511 神奈川県小田原市荻窪440番地
Covers Odawara City, Minamiashigara City, Nakai Town, Oi Town, Matsuda Town, Yamakita Town, Hakone Town, Manazuru Town, Yugawara Town as well as Kaisei Town
- 0465-22-1391
〒250-8585 神奈川県小田原市浜町1-1-47
Covers Odawara City, Minamiashigara City, Nakai Town, Oi Town, Matsuda Town, Yamakita Town, Hakone Town, Manazuru Town, Yugawara Town as well as Kaisei Town
Personal pension consultations are accepted at any pension office in Japan.
- 0465-82-8609
〒258-0003 神奈川県足柄上郡松田町松田惣領2037
Covers Hadano City, Minamiashigara City, Nakai Town, Oi Town, Matsuda Town, Yamakita Town as well as Kaisei Town
- 0465-83-5111
〒258-0021 神奈川県足柄上郡開成町吉田島2489-2
Covers Minamiashigara City, Nakai Town, Oi Town, Matsuda Town, Yamakita Town as well as Kaisei Town
FAQ
Frequently asked questions
What is the phone number of the Kaisei Town Office?
The main phone number of the Kaisei Town Office is 0465-83-2331. 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 Kaisei Town Office? What time does it open and close?
Opening hours of the Kaisei Town 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 Kaisei Town 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.town.kaisei.kanagawa.jp/) or the Mynaportal. Check the official website for any weekend service counters.
Which tax office and pension office cover the Kaisei Town Office?
Kaisei Town is covered by the Odawara Tax Office (0465-35-4511). It handles national taxes such as income tax and consumption tax returns and tax certificates. Pension matters are handled by Odawara Pension Office (0465-22-1391); 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 Kanagawa.
NEARBY
Other municipalities in Western Area, Kanagawa
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).