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History

P. S. Mitsubishi has been leading the PC technology and industry in Japan since the construction of the first PC bridge in the country.

1950-

1951
Establishment of the first prestressed concrete factory at Nanao Shipyard of East-Japan Heavy Industries
1952
Establishment of PS Concrete as the first prestressed concrete business organization in Japan, taking over Nanao Shipyard from East-Japan Heavy Industries which became Mitsubishi Heavy Industries,Ltd
Civil Engineering
  • Business expansion from PC crosstie manufacturing to PC bridges
  • Construction of the first PC bridge in Japan
Architecture
  • Development of the precast WT slab

1960-

1960
Establishment of Shinryo Construction by ten Mitsubishi group companies
1962
Stock listing on the second section of the Tokyo Stock Exchange
1969
Company name change from Shinryo Construction to Mitsubishi Construction
Civil Engineering
  • Breakthrough in rapid construction with cast-in-place concrete on scaffolding for high speed rail train and highway projects
Architecture
  • Development of the HPC bracing building method
  • Development of the Palm Framing structure
  • Development of the PS assembling pool

1970-

1975
Entry to oversea business
Civil Engineering
  • Entry to Prestressed concrete pavement
  • Development of Various original construction equipments
  • Development of Various new construction methods for long span bridges and new bridge structures
Architecture
  • Development of the Uni-Frame structure
  • Development of the thin-walled framing structure

1980-

1985
Entry to nuclear business
1988
Opening the R&D Laboratory in Omiya
1989
The first corporate joint venture establishment in Indonesia
Civil Engineering
  • Development of the concrete lining method with pre-erected composite arch (CLCA method)
  • Development in Various non-bridge fields; PCCV, disaster-prevention facilities, airport runway, pavement life-up
  • Application of precast PC pavement to airport runway
Architecture
  • Joint development of seismic isolation foundation system
  • Construction of the first retractable roof building
  • Development of the CS slab (prestressed concrete slab)
  • Development of a middle high building system
  • Development of the PC precast assembling construction

1990-

1991
Company name change from PS Concrete to PS Corporation
1995
Award of the first Indonesia development contribution prize by the Indonesian government commemorating 50 year anniversary of independence
1996
Stock listing on the first section of the Tokyo Stock Exchange
1997
Acquisition of ISO9002 certificate
1998
Transition from ISO9002 to ISO9001
Civil Engineering
  • Continuous development of new materials (construction of the world first carbon fiber PC bridge)
  • Development of PC-steel composite bridges (corrugated steel web bridge)
Architecture
  • Acquisition of technical assessment for the underground continuous wall method (jointly developed)
  • Acquisition of technical assessment and the first construction of the seismic isolation building system
  • Construction of the first membrane structure
  • Development of high-strength high-performance concrete construction technology
  • Development of the new PC composite slab
  • Development of ultra high-rise RC building technology
  • Acquisition of technical assessment for the MIX building (RC-steel composite building)

2000-

2000
Acquisition of ISO14001 certificate
2002
Establishment of P. S. Mitsubishi Construction by a merger of PS Corporation and Mitsubishi Construction Opening the R&D Laboratory in Odawara
2004
Establishment of the US corporation
2005
Establishment of first factory in Vietnam by the joint venture with a Vietnamese company
2007
Establishment of PS Concrete Co.,Ltd
Civil Engineering
  • Acquisition of technical certificate for H-shaped PC piles
  • Acquisition of technical certificate for Ducks Beam (Ultra high strength mortar)
  • Practical application of Ducks Pole (Ultra high strength mortar)
  • Practical application of pretensioned web
  • Development of SPAD as a mass application system of Eco Tube
  • Practical application of COR-T girder (Corrugated web T-girder)
  • Development of underpass construction using H-shaped PC piles
  • Development in underground construction (Micro method,PCNet segment, Press-in precast caisson)
  • Entry to the maintenance field (PC confined, Titanium gird corrosion protection)
  • Acquisition of technical accreditation for non-destructive diagnosis and repair of RC structure
Architecture
  • Acquisition of technical assessment for the PSMIX building (RC-steel composite building)
  • Construction of a 30-floor ultra high-rise seismic isolated RC residential building
  • Acquisition of technical assessment for the PCaPC external framing seismic strengthening method
  • Acquisition of technical assessment for the PreColumn method (jointly developed)
  • Acquisition of technical assessment and the first construction of an ultra high-rise RC building
  • Construction of the first CFT (Concrete filled steel tube) building
  • Construction of the first ultra high-rise RC building
  • Acquisition of performance certificate for the ATMOMiK composite wall (jointly developed)

2010-

Civil Engineering
  • Completion of Colorado River Bridge