Creating houses and towns.
Architecture creates societies and histories,and also is to protect precious lives.
In the construction projects, we demonstrate our unique techniques and know-how and carry out the work collectively by integrating civil engineering and landscape gardening to construct facilities, infrastructures, houses and buildings.
  • What only OCEAN can do
We cover from produce to completion of new construction and repair works with unfavorably urban locations, especially in narrow site in good faith.
  • Architecture and construction of facilities, such as house, shop, office building, condominium and local school
  • The whole procedure from project plan (business income and expenditure) to completion
  • Building sales and tenant agency work
  • OCEAN’s Project Flow
Marketing research/
Enforcement research
Designing project plans(business income and expenditure)
Construction work
Using the cultivated techniques,
knowledge and experiences
Full service


We attain your ideal using economical designs and construction to achieve beautiful landscapes and durability.
As the importance of nature is being considered, landscape gardening techniques in town development is an area which is increasingly required.
OCEAN works on the development of new techniques including park greening projects and rooftop gardens by using landscape gardening techniques which have been developed since our inauguration and responds to expectations whether from corporate or individual clients as a consultant and builder of gardens which the customers seek.
  • What only OCEAN can do
We always adopt the latest technologies and information and carry out projects collectivery.
  • Collective design and construction of landscape gardening, civil engineering and pavement work
  • Working out and making a suggestion of a master plan of landscape gardening, a master plan based on various calculations
  • Environment maintenance managing contract of green spaces and public facilities
  • Production and sales of landscape gardening trees and tropical foliage trees
OCEAN is a professional group!
  • First Class Landscape Gardening Work Operation and Management Engineer/ 6 people,
  • Second Class Landscape Gardening Work Operation and Management Engineer/ 2 people,
  • First Class Engineer Operation and Management Engineer/ 4 people,
  • Second Class Engineer Operation and Management Engineer/ 3 people,
  • Specially Controlled Industrial Waste Manager/ 2 people,
  • Operations Chief of Specified Chemical Substances/ 2 people,
  • First Class Building Operation and Management Engineer/ 4 people,
  • Second Class Building Operation and Management Engineer/ 2 people
Because it is a one stop service, economic efficiency is high and we can provide a maintenance service after construction for many years to come.

Special Construction

Construction in challenging environments with difficult conditions.
We can take care of that.
Railroad construction, road expansion, river works, dam construction, restoration of natural landscapes... We perform special construction works with unique methods, which is in step with the times, by quickly adopting special technologies and methods to maintain the landscape or strength of structures.
We contribute to town development where residents can be assured that Japanese social capital is protected.
  • EPS Construction Method
For road expansion, railroad construction, river soil erosion control developments and dam construction
In EPS Construction Method (Expanded Polystyrol Construction Method), large blocks are piled up and unified as embankment materials. This construction method is to effectively use features of EPS, such as ultra-lightness, compressive resistance, durability and self-standing when piled up.
Main characteristics and advantages
●Reduction of load and earth pressure
Effective for reduction of load and earth pressures for embankments on soft ground or landslide areas, slope widening embankments, back embankments of structure, etc.
●Concerns about the surrounding environment, etc.
Because we do not need large construction machinery, concerns about important neighboring structures and the surrounding environment are eased.
●Conservation of natural environment
Because changing landforms is kept to a minimum, this construction method can contribute to the conservation of the natural environment while planning routes in mountains and during the construction of earth structures.
●Shortening construction period and reducing construction cost
Because it has a good workability and ground treatment, temporary works and maintenance after completion are simplified, construction period can be shorten and construction cost can be reduced for the whole project.
  • Imitation stone work
Entrust us for production of imitation stones and restoration of the natural environment
This work is the most appropriate work for a site where the natural landscape should be kept. It is an OCEAN's special construction to produce imitation stones, which you would not believe are artificial, with our unique know-how and embed them into nature naturally.
Main characteristics and advantages
  • Because we shape the imitation stones by mold made from natural stones to create exclusive panels, the reproducibility of the imitation stone work is very high and the imitation stones have the same material feel as the real stones.
  • The work restriction on construction surfaces is kept to a bare minimum as large concavity and convexity can be represented depending on panel combination.
  • Because inorganic pigments are kneaded into the imitation stones, they have good coloring and scratches on the surface are hard to spot after attrition.
  • Manhole Inner Cover Construction Method
For security improvement of hand-holes which optical fiber cables are passed in
OCEAN's Manhole Inner Cover Construction Method which is a technique to support the security of information technology infrastructure project using optical cables by Ministry of Land, Infrastructure, Transport and Tourism has achieved the number of satisfactory results.
Currently, most of our satisfactory results are from the optical cable security improvement of the information box by Ministry of Land, Infrastructure, Transport and Tourism. We will keep working on not only the security improvement of the information box, but also the security improvement of all hand-holes which important optical fiber cables are passed in.
※This construction method is already registered in New Technology Information System (NETIS) KK-030028