Yokohama City Hall Construction Times

We will deliver the design and plan outline of the new city hall, the progress of the construction, and the construction method to everyone once every three months as the "Yokohama City Hall Construction Times".

Final issue (PDF: 1,960KB)
(April 2020)
The building was completed at the end of January~
　Oh Completion report
　　　Office (high-rise)
　　　Meeting Room and Committee Room (Middle Division)
　　　Atrium (low-rise part)
　　　Citizen-use facilities (low-rise areas)
　　　Exhibition of exterior and remains
　　　Bashamichi Station, Sakura Mirai Bridge Connection　

No. 10 (PDF: 2,239KB)
(December 2019)
~ Appearance, close to completion! ～
　Oh Points of the Plan
　　　Planning of exterior and parliamentary functions
　Oh On-site report
　　　Construction status of planting, exterior, low-rise, and atrium
　Oh About historical remains unearthed on the site of the new city hall

No. 9 (PDF: 5,673KB)
(September 2019)
-The atrium, which is an atrium space with a height of about 20m, has appeared ~
　Oh Plan for Atrium
　Oh I know a little bit of architecture
　　　Method of construction of atrium
　Oh On-site report
　　　Construction status of administrative buildings, atrium, and assembly buildings
　Oh We received electricity in August

No. 8 (PDF: 2,154KB)
(June 2019)
-The installation of the outer wall of the administrative building has been completed~
　Oh Points of the Plan
　　　Planning for the high floor of the administrative building
　Oh I know a little bit of architecture
　　　Elevators that support intermediate-level seismic isolation
　Oh On-site report
　　　Atrium steel frame construction, interior construction of administrative buildings, floor construction of parliament, etc.
　Oh I made the upper building

No. 7 (PDF: 2,006KB)
(February 2019)
-The exterior construction has progressed, and the whole picture of the building has begun to appear! ～
　Oh Points of the Plan
　　　Utilization of BIM
　Oh Demolition of large tower cranes

　Oh On-site report
　　　Steel frame construction, exterior wall construction, equipment plumbing work, foundation work, etc.
　Oh "Outside Kannai OPEN!" Participation in

No. 6 (PDF: 5,511KB)
(December 2018)
~ Ground steel frames and exteriors are being built up smoothly! ～
　Oh Points of the Plan
　　　Environmental Technology (Fuel Cell)
　Oh Let's know a little about architecture!
　　　How do you build a steel frame straight?
　Oh On-site report
　　　Status of steel frame construction and fire-resistant coating work
　Oh Interview with a temporary enclosure art creator
　Oh Implementation of children's adventure

No. 5 (PDF: 2,127KB)
(August 2018)
The ground steel frame is being built up smoothly! ～
　Oh Points of the Plan
　　　Environmental Technology
　　　・Air conditioning system in the office
　　　・DHC (Regional Heating and Cooling)
　　　・Underground heat air conditioning
　Oh On-site report
　　　How do you get up with a tawork lane?
　　　Site construction status
　Oh Let's know a little!
　　　Holding a symposium
　　　Introduction of temporary enclosure art

No. 4 (PDF: 2,715KB)
(April 2018)
We are working on ground construction and underground construction at the same time! ～
　Oh Points of the Plan
　　　BCP measures
　　　・Japan's highest rank seismic performance - adopt hybrid seismic isolation -
　Oh On-site report
　　　Construction of steel frames and seismic isolation layers on the ground
　　　Underground excavation work, steel frame work, floor work
　Oh Let's know a little!
　　　Design supervision of the new city hall

No. 3 (PDF: 1,634KB)
(February 2018)
-To a new government building that plays a central role in crisis management that can deal with various crises-
　Oh Points of the Plan
　　　BCP measures
　　　・Equipment measures
　　　・Introduction of earthquake and structure monitoring systems
　Oh On-site report
　　Flow of steel frame construction and upfront floor construction on the first floor
　Oh Let's know a little about architecture!
　　What is the difference?

No. 2 (PDF: 3,388KB)
(November 2017)
-We are proceeding with pile construction that serves as the foundation of the building~
　Oh Points of the Plan
　　Concept of landscape formation
　　High-rise exterior plan
　Oh On-site report
　　Flow of construction of place-mounted piles and construction pillars
　Oh Let's know a little about architecture!
　　What is the difference?

No. 1 (PDF: 1,009KB)
(August 2017)
We started construction with the aim of completion in 2020! ～
　Oh Points of the Plan
　　Where is the new city hall planned?
　　What kind of building is the new city hall?
　Oh On-site report
　　The groundbreaking ceremony was held!
　Oh Let's know a little about architecture!
　　The construction period is shortened by the reverse hitting (Sakauchi) method!