An engineering company in Hanoi, Vietnam

Drawings and daily site reports.
Construction knowledge, delivered digitally.

CNK Lab provides CAD / BIM-CIM drafting services and develops software for construction sites. We work in Japanese, English and Vietnamese — from kickoff to delivery.

We reply to every inquiry within one business day.

Japanese-language supportMeetings, specifications and deliverables in Japanese
9:00–18:00 JSTAligned with Japanese business hours
NDA & data protectionDrawings and site photos handled under strict procedures
Multi-layer QA / QCStandardised workflow, Japanese drafting standards

What we do

We make drawings. We make tools for the site.

Drafting and modelling services, plus software development for construction companies — both by engineers who know how construction actually works.

Prestressing tendon layout model of a bridge

Engineering services

CAD / BIM-CIM services

From 2D drafting to BIM / CIM modelling and quantity take-off. Deliverables that follow Japanese design and construction standards, produced through a standardised workflow.

2D drafting (architecture, structure, MEP, civil)
BIM / CIM modelling (to specified LOD)
Quantity take-off
Modelling from 2D drawings and sketches

Learn more

Software development

Construction software & tools

Turning site reporting — daily reports, photos, forms — and drawing / data preparation into easy-to-use web tools. We design and build systems for construction companies, starting with our own product, Genba Tsuzuri.

Daily reports, photos and forms as a system
Review and approval workflows
AI training data annotation
Drawing digitisation and automation tools

Learn more

Business 1 — CAD / BIM-CIM services

Drawings and models, to Japanese standards.

We take on drafting and modelling work from design offices and contractors, in Japanese. Per-project contracts or a monthly dedicated team — both work.

Scope

01
2D draftingArchitecture, structure, MEP and civil. Drawing checks and quantity verification too.
02
BIM / CIM modellingModelling from 2D drawings or hand sketches. Architecture, structure, MEP, bridges and earthworks, to the LOD you specify.
03
Quantity take-offQuantities from models and drawings, with take-off sheets formatted for your use.
04
As-built & digital recordsPost-construction drawing updates and digital as-built documentation.

Deliverables & formats

DWG / DXF
RVT
IFC
NWD
PDF drawings
Excel quantity sheets

Delivered to your title block, layer standards and naming conventions.

Software

AutoCAD
Revit
Civil 3D
Navisworks
Dynamo

Selected works

Mainly architectural, bridge and earthwork modelling for clients in Japan. Only a selection is shown, under confidentiality obligations.

High-rise residential — architectural & structural BIMRevit · LOD 300 · approx. 4 weeks
Steel-frame building — structural & MEP BIMRevit · LOD 300 · approx. 4 weeks
High-rise — MEP BIMRevit · LOD 350 · approx. 4 weeks
Bridge — PC tendon layout modelRevit · LOD 200 · approx. 2 weeks
Pile cap & footing — rebar modelCivil 3D · LOD 300 · approx. 1 week
Wind farm — earthwork & access road CIMCivil 3D · approx. 5 km of road · approx. 4 weeks

Ask about CAD / BIM-CIM

Business 2 — Construction software & tools

Site work, turned into tools people actually use.

Reporting that runs on paper, Excel and email, rebuilt as a system that works on a phone and in a browser. Engineers who know construction handle everything from requirements to development and operation.

What we support

01
Daily reports, photos and formsFrom on-site entry to PDF form output, reporting becomes one flow.
02
Review and approval workflowsFrom internal review to client approval, status and history shared on screen.
03
AI training data annotationLabelling drawings, site photos and BIM data; data preparation for AI development in construction.
04
Drawing digitisation and automationConverting scanned drawings to CAD, and tools that automate routine Excel and CAD work.

How we build

Web applications (Laravel)
Phone and tablet ready
Japanese UI and support
Cloud operation and maintenance (SLA)

Flagship productGenba TsuzuriDaily site report system

Daily reports: write, review, keep.

Log daily reports and photos from the site on a phone, and run internal review and client approval in one flow. PDF output and an approval history keep the record. Built for contractors and specialist trade companies.

Enter on site, photos includedAttach morning-meeting, before and after photos to each work item.
From internal review to client approvalDraft → internal review → client approval, shared on screen. Change requests happen in place.
Keep it as PDF and historyForm-style PDF output and an approval history preserve the record.

Request a demo Discuss a project

Let's talk — no commitment.

Drafting and modelling requests, or software development — in Japanese, English or Vietnamese.

Strengths

Why clients choose CNK Lab

"Construction & Knowledge" — practical construction expertise is our foundation, for drawings and software alike, built from the user's point of view.

01Japanese, English and VietnameseSpecifications and Q&A in Japanese.Specification alignment and Q&A in Japanese. A two-hour time difference and hours aligned with Japan.
02Construction practice and software, togetherTools designed by people who draw the drawings.We design tools that genuinely work on site — from the perspective of the people who draw the drawings.
03Leaders experienced at Japanese firmsUp to 10 years of AEC experience, including at Japanese firms.Leaders with up to 10 years of AEC experience, including work at Japanese firms, mentor the team — drafting to Japanese standards on current licensed Revit, Civil 3D and Navisworks.
04Cost efficiency40–60% lower than in-house staffing.Offshore delivery saves 40–60% versus in-house staffing, with quality secured by multi-layer QA / QC.

How it works

How to get started

Project-based contracts and a monthly dedicated-team ("lab") model are both available. Start with a small trial.

1
ContactReach us via the form or by email.
2
Scoping & quoteWe review drawings and specifications and propose scope, schedule and rates.
3
TrialA small project to confirm quality and the way of working.
4
ContractPer project, or a monthly dedicated team. NDA signed.
5
Delivery & operationRegular reporting and revisions. Products are maintained under an SLA.

Company

Company profile

CNK Lab — "Construction & Knowledge" — combines practical construction expertise with digital technology to support construction companies in Japan.

English name: CNK LAB COMPANY LIMITED (CNK LAB CO., LTD)
Vietnamese name: CÔNG TY TNHH CNK LAB
Legal form: Limited liability company (Vietnam)
Representative: Chu Anh Tuấn
Address: 23rd Floor, CEO Tower, Lot HH2-1, Me Tri Ha Urban Area, Pham Hung Road, Tu Liem Ward, Hanoi, Vietnam
Founded: 2026
Business: CAD / BIM-CIM drafting services, construction software and tool development, AI training data annotation
Languages: Japanese, English, Vietnamese
Business hours: Mon–Fri 9:00–18:00 (JST)
Contact: contact@cnklab.com

Contact

Let's talk about
your project.

Spot requests from a few drawings, a monthly dedicated team, or a Genba Tsuzuri demo — all welcome. We reply within one business day.

contact@cnklab.com
You can reach us in Japanese, English or Vietnamese

Drawings and daily site reports.Construction knowledge, delivered digitally.