1. Site survey & brief (2–4 weeks)

We start with the land. Topography, road frontage, neighbours, utilities — all measured on site, while zoning, coverage, FAR, setback rules, and fire-zone status are confirmed at the legal affairs bureau and city hall. This stage settles what can — and cannot — be built on the plot.

In parallel we capture your brief: family composition, lifestyle, cars, storage, budget, timeline, taste. It lands on a single A3 sheet that anchors the whole project.

2. Schematic design (1.5–3 months)

From the brief we test plans, sections, elevations, and siting. The output: a small model, schematic drawings, and a rough cost estimate. Structure (RC, wood, steel) and total area get locked in. We run 3–5 variants and converge on one.

3. Detailed design (2–4 months)

Architectural, structural, and MEP drawings — 100–200 sheets in total. Every finish is specified to the point a contractor can price it. Anything left undecided here turns into a site argument later.

4. Building permit (1–2 months)

The drawings go to a designated inspection body to verify compliance with the Building Standards Act. RC projects and any structure above three storeys also require a separate structural peer review, adding roughly a month.

5. Contractor selection & contract (1–2 months)

We send the drawings to 2–4 contractors for competitive bidding. We compare price, of course, but also track record, the on-site supervisor's experience, and the credibility of the proposed schedule. Contract: a works agreement plus the full drawing set.

6. Groundbreaking to completion (6–18 months)

After the jichinsai Shinto ceremony we move through ground improvement, foundations, frame, roof, envelope, fit-out, and services. RC residences: 14–18 months; wood: 6–10. The supervising architect visits the site at least every two weeks to verify everything is built to drawing.

7. Inspection & handover (2–3 weeks)

The inspection body issues the certificate of completion. Separately, we walk the project with you and compile a defects list, then chase remedies to zero. Once the snag list closes, you receive the certificate, title document, and warranties — and the keys.

The longest stretches in a Japanese project are design and permit. The construction itself is fast and precise. A typical luxury build: 4 months design, 2 months permit, 12 months construction, 1 month inspection.