What Onestruction does

Onestruction (ONESTRUCTION Inc.) is a Japanese construction technology company founded in March 2020 by students at Tottori University and headquartered in Tottori City, with branch offices in Tokyo (Shinjuku) and Osaka (QUINTBRIDGE, relocated July 2026). The company operates a dual product-and-services model targeting the Japanese construction industry. Its core product is the OpenAEC suite, a SaaS platform built on buildingSMART International's openBIM standards (IFC, IDS, bSDD, BCF, openCDE) that standardizes BIM data quality and eliminates data silos across construction project participants; the suite includes OpenAEC for Desktop (a free IFC viewer, the first Japanese product to reach the openBIM Awards finals), OpenAEC for bSDD (Revit and Civil3D plugin), and OpenAEC for CDE (Common Data Environment connector). Onestruction also develops the Ishigaki series of construction domain-specific AI foundation models, including Ishigaki-IDS (8B-parameter model for generating BIM information delivery specifications) and the planned Cycle 4 model for 2D-to-3D BIM data generation, both developed under the METI/NEDO GENIAC program and published on Hugging Face.

The company monetizes through a mix of subscription-based SaaS (OpenAEC products, with one module offered free as a freemium funnel), professional services including BIM/CIM consulting (3D modeling, interference checks, quantity takeoffs, construction simulation) and end-to-end DX solution development, custom AI implementation services (agents, applications, on-premises generative AI deployment), and Autodesk software resale. It serves large Japanese general contractors (Kajima, Shimizu, Obayashi, Takenaka), engineering consultants (Nippon Koei, JR East Consultants, Yachiyo Engineering), government agencies (MLIT, Tottori Prefecture), and is expanding internationally via a strategic India partnership with DataKaveri Systems targeting 55 smart cities.

Revenue is not publicly disclosed. Total capital raised to date is ¥910 million (approximately $5.7M USD) across a 2024 Chugin Capital investment and an April 2026 mixed equity-and-debt round; investor quality is institutional and strategically aligned (Mitsui Sumitomo Insurance Venture Capital, regional banks, government-backed Japan Finance Corporation). The company has earned industry-defining recognition as the first Japanese project to win first place at the buildingSMART International openBIM Awards (2025) and remains the only Japanese bSDD distributor.

Name

Onestruction

Legal name

ONESTRUCTION株式会社

Website

https://onestruction.com

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

11–50 employees

Short description

Onestruction is a Japanese openBIM software and consulting firm that provides the OpenAEC SaaS platform, BIM/CIM modeling services, and construction domain-specific AI foundation models to major Japanese general contractors, engineering consultants, and government agencies.

Ownership category

akta.pro rank

Product category

Construction Technology Software (openBIM/BIM)

NAICS

Software Publishers (5132), Custom Computer Programming Services (541511), Computer Systems Design Services (541512)

SIC

Services-Prepackaged Software (7372), Services-Computer Programming Services (7371), Services-Engineering Services (8711)

akta.pro primary industry

EDA Cloud/SaaS, Design Data Management & Collaboration (HDAHAFAJ)

akta.pro secondary industries

Building Information Modeling (BIM) & Digital Design Services (BPAHAKAK), AI Application Enablement Platforms (Copilot/Agent Frameworks, SDKs) (HDAEANAJ)

Keywords

• OpenBIM software solutions
• BIM data management
• Construction AI models
• BIM consulting services
• Construction digital transformation

Headquarters

HQ city

Tottori

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations

Revenue model

1. OpenAEC Software Products: SaaS applications and desktop solutions for BIM data quality management. OpenAEC for Desktop is offered free; other products are subscription-based SaaS.
2. BIM/CIM Consulting Services: Management, documentation, and modeling services for BIM implementation in architectural, civil engineering, and real estate industries. Includes 3D model creation, interference checks, construction simulation, and quantity takeoffs.
3. Construction DX Solutions: End-to-end DX solution development including consulting, system development, and businessization support for construction companies.
4. Construction AI Solutions: AI agent development, AI application development, and custom AI development services for construction industry AX (AI Transformation).
5. Autodesk Software Sales: Autodesk certified sales agent providing Autodesk software products at discounted prices.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels5 records

Core offering

ONESTRUCTION develops and sells the OpenAEC software suite (SaaS platform, free desktop IFC viewer, bSDD/Revit and Civil3D plugins, and CDE connector) for openBIM-based BIM data quality management. The company also develops construction domain-specific AI foundation models (Ishigaki series, including Ishigaki-IDS) and the Contex AI software. In parallel, it delivers professional services including BIM/CIM 3D modeling and consulting, DX strategy and system development, AI agent/application development, and acts as an authorized Autodesk software reseller.

Product overview

ONESTRUCTION is an openBIM company offering a platform-plus-modules product architecture centered on the OpenAEC Suite. The core OpenAEC platform enables openBIM workflows for BIM data quality management, supplemented by specialized modules: OpenAEC for Desktop (IFC viewer), OpenAEC for bSDD (Revit/Civil3D plugin), and OpenAEC for CDE (CDE connector). The company also offers Ishigaki, a construction domain-specific AI foundation model (including Ishigaki-IDS for IDS generation), and Contex, AI software for converting construction data into assets. Services include BIM/CIM implementation support, DX consulting and development, AI implementation services, and BIM automation programming. All products adhere to buildingSMART International openBIM standards (IFC, IDS, BCF, bSDD, openCDE).

Differentiator

Problem solved

Functional benefit

Brands

• OpenAEC: OpenBIM workflow solution suite including OpenAEC, OpenAEC for Desktop (IFC viewer), OpenAEC for bSDD (Revit/Civil3D plugin), and OpenAEC for CDE (CDE connection plugin).
• Ishigaki
• Contex

Products and services

• OpenAEC OpenAEC is a buildingSMART International openBIM workflow-enabling SaaS platform that eliminates data silos in the construction industry by standardizing BIM data across companies involved in construction projects. It is targeted at general contractors, engineering firms, and government agencies implementing openBIM.
• OpenAEC for Desktop OpenAEC for Desktop is a free IFC viewer application that allows users to view and inspect Industry Foundation Classes (IFC) BIM files on desktop. It is offered as a free tool to support the openBIM community and is recognized by buildingSMART International.
• OpenAEC for bSDD OpenAEC for bSDD is a plugin providing automated data input into BIM authoring tools through bSDD (buildingSMART Data Dictionary) and IDS (Information Delivery Specifications). Available as Revit and Civil3D plugins for AEC professionals needing standardized component data entry.
• OpenAEC for CDE OpenAEC for CDE is a plugin that connects various Common Data Environments (CDEs) with OpenAEC, enabling rapid and smooth IFC import/export to client- or team-configured CDEs. It is targeted at multi-stakeholder construction projects requiring interoperable data exchange.
• Ishigaki (Construction Domain AI Foundation Model) Ishigaki is a series of construction domain-specific AI foundation models that understand construction-specific knowledge, data formats, and operational workflows. Ishigaki-IDS (8B parameters) specializes in generating and validating Information Delivery Specifications (IDS) for BIM data requirements through conversational interaction. Used by construction firms and BIM managers for AI-augmented BIM workflows.
• Contex Contex is AI software that converts construction data into reusable assets to improve existing workflows. It is targeted at construction companies seeking to operationalize their BIM and project data through AI-driven asset conversion.
• BIM/CIM Services BIM/CIM services include BIM management, documentation, and 3D modeling for architecture, civil engineering, building facilities, and real estate industries. Service scope covers 3D model creation, interference checks, construction simulation, CG/photo visualization, animation, document management, and quantity takeoffs across work types such as buildings, roads, tunnels, dams, and RC/PC structures.
• DX Solutions DX Solutions are digital transformation consulting and system development services for the construction industry. The offering includes DX strategy development and roadmap design, BIM data utilization planning, BIM-integrated system development, 3D viewers and visualization tools, automation program development, and IFC/openBIM-compliant development with support for SaaS productization and go-to-market strategy.
• AI Implementation Services AI Implementation Services provide construction domain-specific AI development including AI agent development, AI application development, and custom AI development. Service scope covers image-based damage detection, vibration-based anomaly detection, on-premises generative AI deployment, and RAG-based interfaces for construction and infrastructure use cases.
• Autodesk Software Resale ONESTRUCTION acts as an authorized Autodesk software reseller, providing Autodesk products at discounted prices to AEC customers in Japan. This channel complements the company's BIM/CIM consulting and openBIM software offerings.

Quantifiable outcome

• Greatly reduces manual cross-checking and input errors in quantity takeoff operations through semi-automated linking between design models and quantity takeoff data
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration18 records

AI capability11 records

Feature7 records

Partnerships

Five partnerships are on record, tiered minor and core.

• Airion Co., Ltd.minorGTM or Marketing Partner · 30 June 2026Joint event co-host with Airion (manufacturing AI venture, fellow GENIAC Cycle 3 selected company) for a roundtable discussion on industry-specific AI development.
• DataKaveri SystemscoreStrategic or Co-development Partner · 22 April 2026Strategic partnership with DataKaveri Systems (commercial arm of IISc Bengaluru's Centre of Data for Public Good) to integrate openBIM-based construction data (IFC-compliant) with India's Intelligent Universal Data Exchange (IUDX) platform operating across 55 smart cities. Partnership signed at IISc Bengaluru during inaugural Japan-India AI Strategic Dialogue.
• Kanemoto CorporationcoreStrategic or Co-development PartnerCo-development of BIM/CIM education program with Kanemoto Corporation. Joint educational content covering BIM/CIM utilization, openBIM concepts, and BIM creation methods.
• buildingSMART InternationalcoreTechnology or IntegrationActive participation in buildingSMART International Strategic Projects (particularly bSDD); Diamond sponsor of buildingSMART Japan; platinum sponsor of bSI Summit Tokyo 2026.
• Autodesk, Inc.coreStrategic or Co-development PartnerPlanned MOU for collaboration. Appointment of former Autodesk executive Yoshihiko Fukuchi as Senior Fellow. Joint seminars on BIM data utilization workflows.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Autodesk: Global leader in AEC software (Revit, Civil 3D, Autodesk Construction Cloud). ONESTRUCTION builds openBIM plugins for Revit/Civil3D and is both a strategic partner and a competitor in BIM data interoperability.
• Trimble: Provider of construction technology including Tekla Structures for structural BIM and a broad portfolio of AEC/survey solutions. Comparable as a horizontal construction-tech incumbent pursuing BIM interoperability and digital workflows.
• Bentley Systems: Infrastructure engineering software provider (OpenRoads, OpenBuildings, iTwin). Comparable in serving civil/infrastructure BIM and digital-twin use cases that overlap with ONESTRUCTION's civil engineering and infrastructure focus.
• Nemetschek Group: AEC software group owning Graphisoft (ArchiCAD), Solibri (BIM quality/validation), and Vectorworks. Directly comparable as a BIM software platform with quality-checking capabilities overlapping OpenAEC's IDS-based validation.
• Dassault Systèmes: Provider of 3DEXPERIENCE platform with CATIA and infrastructure industry solutions. Comparable as an enterprise AEC/infrastructure platform player pursuing model-based collaboration and digital twins.
• Procore Technologies: Cloud-based construction project management platform. Comparable as a horizontal SaaS serving general contractors with overlapping buyer personas (top Japanese GCs and global GCs).

Direct peers

• Solibri (Nemetschek): BIM validation and quality assurance toolset used for model checking and information delivery. Highly comparable to ONESTRUCTION's OpenAEC platform, which uses IFC/IDS-based validation for BIM data quality management.

Emerging players

• OpenSpace: AI-powered construction site capture and progress tracking platform. Comparable as an applied-AI construction-tech company pursuing computer-vision and structured-data workflows analogous to ONESTRUCTION's AI initiatives.
• Bricsys (BricsCAD): Provider of BricsCAD and Bricsys BIM with openBIM-friendly DWG/CAD workflows. Comparable as a vendor-neutral BIM platform emphasizing open standards and IFC interoperability.
• Alice Technologies: AI-driven construction scheduling and planning platform. Comparable as a construction-specific generative AI startup pursuing domain-specialized models similar to ONESTRUCTION's Ishigaki series.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/onestruction
• Facebookfacebook.com/profile.php?id=61576034138017
• LinkedInlinkedin.com/company/onestruction

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds4 records

Investors6 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Onestruction