WAKACHIKU CONSTRUCTION CO.,LTD.

Wakizuki Construction was founded in 1900 (Meiji 23) with the purpose of building and operating the Kokura Wakimatsu Port in Kitakyushu

The Wakimatsu Port expansion project at the time of founding enabled large-scale supply of high-quality coal and supported the development of modern Japan

Wakatsuki Construction was founded in 1900 with the purpose of building and operating Wakamiya Port in Kitakyushu. The initial Wakamiya Port expansion project enabled the large-scale supply of high-quality coal, supporting the development of modern Japan.

1908: Petition to the prefecture to establish a dredging company

1909: Plan to establish Wakamiya Port Construction Company with a capital of 600,000 yen is finalized

1910: May 23 is designated as the founding day of Wakamiya Port Construction Company: Company building at the time of founding: Wakamiya Port construction work begins

1912: Obtained a license to collect port dues from January 1, 1913

1913: Company renamed to Wakamiya Port Construction Co., Ltd.

1917: Construction of the Fujinoki Nishi Island reclamation project (–1921): Fujinoki reclamation work

1919: Ordered bucket dredging vessels Second Sea Maru and Third Sea Maru from the UK: Second Sea Maru: Third Sea Maru

Meiji 39: Completion of the first and second expansion works at Wakamatsu Port

1928: New company building constructed: Newly built company building

1923: Started operation of seven Priestman dredging machines

1925: Started operation of sand-pump dredging vessel Wakamiya Maru (80 hp) and completed construction of the Hamafune fumigation plant

Taisho 6: Completion of the third expansion works at Wakamatsu Port

1936: Completed the one-character coastline reclamation and seawall construction at Shibata District under the commission of the town council: Completed one-character wharf

1943: Awarded at the 20th anniversary celebration of Wakamiya City

1948: Port dues collection abolished on March 31; revised articles approved due to change of company purpose, expanding into harbor construction

1950: Approved completion of the first phase of the fourth expansion of Wakamiya Port

1955: Construction of 100 housing units for war victims by Wakamiya City begins

Showa 21: Formation of employee union (labor union)

Showa 22: Start of construction of Ashiya Occupation Military Wharf

Showa 24: Application for construction business registration

1950: Implementation of the president system due to amendment of the articles of incorporation

1953: Construction of the 1000-horsepower dredging vessel First Wakizuki Maru at our shipyard: Opening of the Tokyo branch

1955: Completion approval of Phase 2 of the fourth expansion works at Wakimatsu Port

1956: Commencement of the Suna-machi works in Tokyo (self-embankment): Suna-machi embankment site: Commencement of the Idemitsu Kosan Tokuyama refinery works: Idemitsu Kosan Tokuyama refinery wharf and Dolphin works

Showa 33: Completion of new headquarters building

Showa 34: Opening of Tokyo headquarters; start of Ariake artificial island construction; start of Ishihara reclamation works in Yokkaichi City (company reclamation) (-1966); Ishihara company reclamation seawall works

1961: Listing of our shares on the Second Section of the Tokyo Stock Exchange

1962: Listing of our shares on the First Section of the Tokyo Stock Exchange

Showa 38: Completion of Inage reclamation works 1 (company reclamation) in Chiba Prefecture; Inage reclamation works

1965: Renaming to Wakizuki Construction Co., Ltd.

1969: Membership in the Japan Construction Industry Association

1970: Commencement of the construction of the Aogawara Housing Complex

1972: Merger with Kawada Industrial Co., Ltd.

1976: Commencement of the Suez dredging works: Commencement of the lower section works of the Hon-4 Connection Bridge at Omuro Bridge: Lower section works of the Omuro Bridge: Commencement of the Fukuoka City subway works: Fukuoka City subway works

1978: Commencement of the Koyama Super Construction Works

1980: First residential subdivision in Ichihara City, Chiba Prefecture: Development of wave‑break blocks (Pylock)

Showa 58: Adoption of new company emblem

1985: Development of the seated stone‑smoothing method: Commencement of the Haneda offshore ground improvement works

Showa 61: Start of construction of seawall and embankment works in Ground Improvement Zone 3 at Kansai Airport

1990: Issuance of a split‑type new‑share subscription bond with a guarantee from Doru Bank (100 million USD): Commencement of the western works of the Tokyo Bay Crossing Road on the Kisarazu artificial island

Heisei 2: Start of land consolidation project in Kiyose District; 100th anniversary of founding

1993: Commencement of the main construction of the Yanagawa Dam: Yanagawa Dam (Chiba Prefecture)

1994: Development of the skyscraper‑rotor high‑concentration dredging method

1995: Development of the offshore underwater vibro‑stone‑smoothing method

Heisei 7: Start of Kobe New Port West disaster recovery works

1997: Commencement of the construction of the Mondo Port Building and Hotel: Mondo Port Building, Hotel (Fukuoka Prefecture): Establishment of quality assurance policy

1998: Completion of the Wakimatsu Main Store and opening of the Wakichiku Historical Museum: Wakimatsu Main Store, Wakichiku Historical Museum (Fukuoka Prefecture)

Heisei 10: Development of pipe-in-mix solidification treatment method (W-pipe mix method)

2000: Establishment of Wakamatsu Life Research Institute: Commencement of construction of Trincomalee Port in Sri Lanka: Commencement of land consolidation project in Yoshishi, Kitakyushu City, Fukuoka Prefecture: Yoshishi residential land development (Fukuoka Prefecture)

2001: Commencement of seawall construction at Chubu International Airport: Installation of a submerged foundation using the Plying Pontoon method (submerged road construction at central port area of Iwaki Port)

2002: Development of a slope‑adapted stone‑smoothing method: Marine Picker (slope‑adapted stone‑smoothing vessel with inclined rod tamper): Commencement of emergency restoration work for navigation lights and fender facilities at Dili Port, East Timor

2003: Development of a water‑retaining sheet method (Geomarine) for seawall at a marine waste disposal site: Sale of Dimension Akama Station Front (apartment) in Sumiyoshi City, Fukuoka Prefecture: Dimension Akama Station Front (Fukuoka Prefecture)

2004: Commencement of new construction of Kouto Elementary School in Nagasaki Prefecture: Kouto Elementary School (Nagasaki Prefecture): Development of beach sand control technology (DRIM method)

2005: Proposal for offshore wind farm (wind power generation)

2006: Commencement of external works for runway D at Tokyo International Airport: Commencement of tsunami disaster recovery works in Sri Lanka and Maldives due to the Sumatra earthquake: Commencement of improvement works for San Juan del Sur fishing port in Nicaragua: Participation in the PFI project for the Ishinomaki District Regional Administrative Office Fire Department Headquarters (with Ishinomaki Fire Station) relocation and renovation project: Ishinomaki District Regional Administrative Office Fire Department Headquarters (Miyagi Prefecture): Development of 100% copper slag fine aggregate concrete

2007: Development of a large‑scale fish reef system centered on cast‑iron frame and timber fish reefs: Development of RC-Doctor, a survey and diagnostic system for reinforced concrete structures: Development of bridge pier repair technology using underwater work containers (PREDAM method): PREDAM installation concept

2008: Development of an automatic winch system for the underside of piers: Commencement of construction of the new Manara Bridge in Sri Lanka and related road improvement plan

2009: Development of a marine habitat foundation: Commencement of seawall construction for the final disposal site of waste at Iwaki Port No.3: Commencement of construction of Male Second Girls Middle School in Maldives: Male Second Girls Middle School

2010: Research on mudflat creation using recycled glass granulated sand

2011: New inspection method for port steel structures: Application of non‑contact vortex flaw detector (INCOTEST) for thickness measurement underwater: Research on marine environmental restoration using calcia‑modified soil: Commencement of central function improvement works at Jaffna Education Hospital in Sri Lanka: Central function building of Jaffna Education Hospital

2012: Contracted disaster waste disposal work (Ishinomaki Block): Development of decontamination and volume reduction technology for contaminated soil using a high‑performance cleaning device

2013: Commencement of construction of Manmuna Bridge in Sri Lanka

2014: Development of angle‑control device for grab dredging bucket

2015: Construction of grab dredging vessel and fully rotating crane vessel "Wakazuru‑maru"

2016: Commencement of major national highway bridge construction in Sri Lanka – Package 1: Renovation of the technology research institute

2017: Commencement of safety improvement plan for Apia Port in Samoa

2018: Development of technology to prevent spread of contamination during grab dredging

2019: Awarded the i‑Construction Grand Prize – Excellent Award

Reiwa 1: Awarded the Special Award for the 4th Kenetsu Komachi Activity Promotion Recognition

Reiwa 2: Celebrating 130th anniversary: Established the Offshore Wind Development Office to strengthen response to offshore wind power generation business

Reiwa 3: Development of sediment reduction technology using centrifugal dewatering machine for dredging

Reiwa 4: TCFD: Information disclosure based on recommendations: Concrete: AI: Development of a compaction management system

Reiwa 5: Certified as a Health Management Excellence Corporation in 2023