History of New City Hall Development

　Yokohama City was born in 1889 as a small city with a population of 116,000.
　The city hall, which has continued to walk along with the development of the city, has often changed its position mainly in the city center due to the burning of the Great Kanto Earthquake and the Great Yokohama Air Raid, and is now the eighth generation city hall.
　The city hall of the previous generation (7th generation) (PDF: 1,978KB) was built in 1959 as one of the 100th anniversary projects of the opening of the port.
　[Reference] Transition of successive city halls (PDF: 195KB)

　The old city hall has deteriorated facilities and equipment due to more than 50 years (at the time of the formulation of the new city hall maintenance basic plan in March 2013), lack of offices and functions in multiple buildings. There were urgent issues, such as reduced citizen services and operational efficiency due to decentralization, the generation of private building rent, and the need to strengthen crisis management functions.
　In order to solve these issues, we will proceed with the examination for the maintenance of a new city hall, formulate the "New City Hall Maintenance Basic Plan" in March 2014, start construction in August 2017, June 2020. Full service started on the 29th.

　The city hall, located at the junction of the Kannai-District and Minato Mirai 21 district, has been relocated and newly built with commercial facilities that form the bustle of the city.
　The ordering method uses a design and construction batch ordering method, such as "securing earthquake resistance", "introduction of advanced environmental equipment and functions", "reducing construction period", "revitalizing the local economy", etc. In order to emphasize the viewpoints and to secure the performance and specifications required by the city (orderer), from the stage of organizing design requirements, etc., an expert CMr (Construction Manager) ※We have introduced support from 1.
　The atrium, which symbolizes the city hall, is directly connected to Minato Mirai Line Bashamichi Station, and is used for various events and ceremonies as a space where everyone can easily gather, get close to and relax.
　For the operation of commercial facilities, ML (pass-through master lease) method based on the "Ordinance on Operation of Commercial Facilities in Yokohama City Hall (established in December 2017)" ※By adopting 2, we were able to create a lively atmosphere like Yokohama, such as attracting local stores and attractive stores in the city.

※１： At each stage of planning, ordering, design, construction, etc., while maintaining technical neutrality, stand on the side of the ordering party ( Motoichi) and perform various management such as design examination, process management, quality control, cost management, etc. Who do it
※２： In the conventional loan, the loan fee is contracted in advance by real estate appraisal (fixed amount), but in this method, the loan fee is determined after the contract with the ML operator, and the loan fee during the contract period In order to change (it may or may exceed the rent based on real estate appraisal), it has been decided that the loan will be based on the ordinance based on Article 237, Paragraph 2 of the Local Autonomy Law.

　・Special Committee
　・Standing Committee

　・Press release
　・Public information Yokohama

Fiscal 2012
　・Recruitment of citizen opinions for new city hall maintenance basics design (plan)
Fiscal 2014
　・Recruitment of citizen opinions based on Yokohama-shi public works evaluation system
　・2014 1st Yokohama-shi public works evaluation committee (prior evaluation)
　・Yokohama e questionnaire (questionnaire about new city hall maintenance) (PDF: 176KB)
<FY2015 >>
　・2015 first Yokohama-shi public works project evaluation committee (report for opinion report)
　・Symposium to consider the use of the new city hall
<FY2016 >>
　・Yokohama-shi new city government building plan design review (presentation)
　・Symposium to think about "open space" of new city hall of Yokohama
　・Meeting (workshop) to make "open space" together in new city hall
Fiscal 2023
　・2023 1st Yokohama City Public Works Evaluation Committee (ex-post evaluation)

　The maintenance of the new city hall uses the design and construction batch ordering method (design build method) from the basic design stage to maximize the company's unique technology and know-how, and advanced technology proposals (design and construction batch) Based on the type comprehensive evaluation bidding method, the construction was promoted by adopting proposals (hereinafter referred to as “technical proposals, etc.”) that included advanced technologies and excellent ideas submitted by bidders.
　In order to conduct a neutral and fair examination and evaluation of advanced technical proposals submitted by businesses based on specialized knowledge, "Yokohama City Hall Relocation New Construction Technology Proposals" composed of external academics etc. We set up "evaluation committee" and performed examination and evaluation such as technical proposals about Yokohama-shi city hall relocation new construction.

　・June 2021 CFT Structural Award
　・March 2022 Air Conditioning and Hygiene Engineering Society Award Technology Award
　・May 2022 Selected works by the Architectural Institute of Japan
　・May 2022 Yokohama, People, Town and Design Award Machinami Landscape Division
　・August 2022 Nikken Ren Commendation BCS Award
　・November 2022 Kanagawa Prefectural Architectural Competition Excellence Award
　・February 2023 Energy Conservation Grand Prize Director General of the Agency for Natural Resources and Energy

　・Yokohama-shi city hall maintenance fund regulations (April 1, 1989) (PDF: 64KB)
　・Kitanakadori Minami District Redevelopment District Plan (Notice of City Planning Decision on November 30, 1990) (PDF: 372KB)
　・Council for Yokohama-shi city hall maintenance report (January, 1995) (PDF: 727KB)
　・New City Hall Maintenance Basic Design (March 2013)
　・New City Hall Maintenance Basic Plan (March 2014)
　・Yokohama-shi new-shi Government building management basic policy (March, 2016) (PDF: 4,652KB)
　・Yokohama-shi new city government building management plan (the third edition) (March, 2024) (PDF: 7,234KB)
　・Ordinance on operation of Yokohama City Hall commercial facilities (December 25, 2017 Yokohama City Newsletter No. 1043) (PDF: 177KB)
　・The regulations (September 25, 2014 Yokohama-shi bulletin 926th) (PDF: 1,359KB) to revise a part of the regulations about position of office of city
　・Rules (March 25, 2020 Yokohama City Newsletter No. 31) (PDF: 784KB) that determine the enforcement date of the ordinance to revise a part of the ordinance on the location of the office of the city
　・Ordinance to abolish the Yokohama City Hall Maintenance Fund Ordinance (March 31, 2023 Yokohama City Newsletter No. 5) (PDF: 572KB)