What Fuji Juken does

Fuji Juken Co., Ltd. (株式会社富士住建) is a Japanese custom home builder headquartered in Ageo City, Saitama Prefecture, operating under the parent holding company FJ Holdings Co., Ltd. The company designs and constructs made-to-order residences for individual families in the Kanto region of Japan, with its flagship product marketed as the 'Kanzen Full Sōbi no Ie' (完全フル装備の家, or Fully-Equipped Home). The core product proposition is standardization of typically optional features — system kitchen, bathroom, washroom, toilet, curtains, lighting, flooring, entrance doors, windows, solar power generation, exterior walls, roofs, storage, and fittings — into a single fixed-price base package, eliminating upgrade decisions and price negotiation for the buyer. Underlying technical capabilities include Grade 3 seismic resistance with vibration-dampening dampers, high airtightness and high thermal insulation, and a standard solar power generation system, with over 6,000 solar-equipped homes delivered to date.

Fuji Juken operates a sales-led, direct-to-consumer go-to-market model through a network of 25 showrooms distributed across the 1-to-6-prefecture Kanto area: Saitama (8 locations), Tokyo (2), Kanagawa (3), Chiba (2), Ibaraki (2), Tochigi (2), and Gunma (2). Customers initiate the home-building process via showroom tours and consultations, supported by an integrated digital marketing presence on YouTube, Twitter/X, LINE, Instagram, the 'Full Maru Lab' content platform, and downloadable digital flyers. The company's product portfolio has expanded beyond the flagship fully-equipped line into segmented sub-brands targeting specific buyer needs: HIRARI (single-story homes for accessibility and aging-in-place), ZEH (net-zero energy houses), Kishu no Kaze (traditional Kishu-style design), and Hinoki Biyori (premium cypress wood construction).

The business model is a one-time construction-contract revenue stream with multi-year contract duration; pricing is fixed and non-negotiable across all customers. Cost discipline is maintained through the FJK Kai (FJK会) craftsmen's association, a separately incorporated subcontractor network that performs construction under direct separation-based ordering, bypassing intermediation. The company is part of the FJ Holdings Group alongside SAZAIE Corporation, Kalmia Corporation, and Fullmaru Reform Corporation, providing adjacent capabilities in real estate services and renovation. Brand visibility is reinforced through CSR activities, corporate nursery schools (Saitama Fullmaru-mu and Yokohama Fullmaru-mu) that aid recruitment, and sports sponsorships including RB Omiya Ardija football club, the Japan Para-Sports Association, and professional golfers Takano Aki and Yoshiba Rumi.

Name

Fuji Juken

Legal name

株式会社 富士住建

Website

https://fujijuken.co.jp

Company type

Private

Founded year

2009

Operating status

Operating

Short description

Fuji Juken (富士住建) is a privately held Japanese custom home builder based in Ageo, Saitama, that designs and constructs fully-equipped custom residences for individual families across the Kanto region through a network of 25 showrooms.

Ownership category

akta.pro rank

Product category

Custom Home Construction

NAICS

New Single-Family Housing Construction (except For-Sale Builders) (236115)

akta.pro primary industry

Custom Home Building (IMAFABAC)

akta.pro secondary industry

Residential Green / High-Performance Home Construction (Net-Zero, Passive House) (IMAFABAH)

Keywords

• Custom home building
• Residential construction
• Earthquake-resistant housing
• Energy-efficient homes
• Fully-equipped homes

Headquarters

HQ city

Ageo

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales

Revenue model

1. Custom Home Construction Contracts: Fuji Juken generates revenue primarily through 請負工事 (construction contracts) for custom-built homes. The company designs and builds custom residences for individual customers in the Kanto region of Japan. All pricing is standardized without negotiation - a fixed price model with no discounts, ensuring fairness to all customers.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels8 records

Core offering

Fuji Juken designs and builds custom single-family homes for individual buyers in the Kanto region of Japan under the "Kanzen Full Soubi no Ie" (完全フル装備の家, Fully-Equipped Home) concept. All standard equipment — system kitchen, bathroom, flooring, lighting, curtains, solar panels, exterior, roofing, doors, windows, and storage — is included in the base price as standard rather than optional upgrades. Homes are built to seismic Grade 3 standards with vibration dampers, high airtightness/insulation, and standard solar power generation, delivered turnkey from design through construction and after-sales service.

Product overview

Fuji Juken is a custom home builder offering a unified '完全フル装備の家' (Fully Equipped Home) product line, where all standard equipment features are included as part of the base package rather than optional add-ons. The product lineup includes specialized sub-brands such as HIRARI (single-story homes), ZEH (zero energy houses), 紀州の風 (regional Kishu-style homes), and 檜日和 (hinoki cypress wood homes). Individual equipment modules for kitchens, bathrooms, flooring, and solar systems are presented as standard inclusions rather than separate products. The company operates across the Greater Tokyo area (Saitama, Tokyo, Kanagawa, Chiba, Ibaraki, Tochigi, Gunma prefectures) with 25 showrooms.

Differentiator

Problem solved

Functional benefit

Brands

• 完全フル装備の家 (Kanzen Full Equipment no Ie): The company's main product concept featuring fully-equipped standard features including solar power systems, earthquake resistance (seismic isolation grade 3), and high insulation
• HIRARI (平屋)
• ZEH
• 紀州の風 (Kishu no Kaze)
• 檜日和 (Hinoki Biyori)
• FJK会 (FJK Kai)
• フルまる〜む (Fullmaru-mu)
• FJK Holdings

Products and services

• Kanzen Full Soubi no Ie (完全フル装備の家 / Fully-Equipped Custom Home) Flagship custom-built single-family home line in which all standard equipment — system kitchen, bathroom, flooring, lighting, curtains, solar panels, exterior walls, roof, doors, windows, storage — is included in the base price with no optional upgrades. Built to seismic Grade 3 with vibration dampers and high airtightness/insulation. Targeted at families in the Kanto region who want a turnkey home without upgrade-decision complexity.
• HIRARI (平屋 / Single-Story Home) Single-story floor plan custom home offering one-floor living convenience and accessibility for all ages. Delivered with the same fully-equipped standard specification as the flagship line.
• ZEH (Zero Energy House) Net Zero Energy House custom home design that combines standard solar power generation, high airtightness/insulation, and energy-efficient equipment to achieve net-zero annual energy consumption.
• Kishu no Kaze (紀州の風) Custom home line incorporating traditional Kishu (Wakayama) regional architectural characteristics and materials.
• Hinoki Biyori (檜日和 / Hinoki Cypress Home) Custom home line emphasizing premium Kishu hinoki (Japanese cypress) wood materials, natural quality, and traditional craftsmanship.

Quantifiable outcome

• Over 6,000 solar power homes delivered
• +2 more outcomes

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• FJ Holdings GroupcoreOthersFuji Juken is part of the FJ Holdings Group, which includes FJ Holdings Corporation, Fuji Juken Co., Ltd., SAZAIE Co., Ltd., Kalmia Co., Ltd., and Full Maru Reform Co., Ltd. The group operates synergistically in the housing and real estate sector.
• FJK Kai (FJK会)coreOthersFJK Kai is a craftsmen's association composed of construction contractors and artisans essential to Fuji Juken's home building. The craftsmen autonomously established this association for mutual discussion, training sessions, and close communication with Fuji Juken. This direct separation-based ordering to craftsmen helps reduce costs while ensuring high quality through responsible construction by assigned craftsmen.
• RB Omiya ArdijaminorGTM or Marketing PartnerFuji Juken is an official partner of RB Omiya Ardija football club, providing marketing and brand visibility benefits through sports sponsorship.
• RB Omiya Ardija WOMENminorGTM or Marketing PartnerFuji Juken is a top partner of RB Omiya Ardija WOMEN football team, supporting women's sports and gaining brand exposure.
• Japan Para-Sports Association (日本パラスポーツ協会)minorOthersFuji Juken supports the Japan Para-Sports Association as an official supporter, contributing to para-sports development in Japan.
• Blind Soccer Japan National Team (ブラインドサッカー日本代表)minorOthersFuji Juken supports the Blind Soccer Japan National Team through internal fundraising, demonstrating commitment to para-sports.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Daiwa House Industry: Japan's largest homebuilder and a publicly listed general construction company. Comparable as a major national custom and spec home builder competing for the same Japanese family-buyer segment, but with a vastly broader portfolio (logistics, commercial, international).
• Sekisui House: One of Japan's top homebuilders, offering both custom and spec single-family homes with strong emphasis on energy efficiency and seismic standards. Overlaps Fuji Juken in family-buyer custom-home positioning but operates at national scale with greater brand recognition.
• Panasonic Homes: Major Japanese homebuilder offering custom and prefab homes with strong technology/energy-efficiency branding. Comparable to Fuji Juken in the standardized fully-equipped value proposition, with deeper engineering and brand backing.
• Mitsui Home: National Japanese custom homebuilder under the Mitsui group, offering premium custom homes with strong seismic and insulation technologies. Comparable customer base and product quality tier, with deeper corporate backing.
• Asahi Kasei Homes (Hebel Haus): Major Japanese homebuilder specializing in steel-structure and high-insulation homes. Comparable in family-buyer custom home segment with strong energy-efficiency branding.

Direct peers

• Tama Home: Mid-size Japanese homebuilder focused on reasonably priced custom/spec homes, with strong Kanto and nationwide presence. Closely comparable in target customer (family buyers) and bundled-equipment positioning.
• Ichijo Komuten: Japanese homebuilder emphasizing energy-efficient, fully-equipped homes with high insulation standards. Closely aligned with Fuji Juken's positioning on standard high-performance features at transparent pricing.

Regional players

• Heim (Hida): Custom homebuilder under Hida Sangyo with wood-based construction. Comparable product architecture (wood-frame custom homes) but more limited geographic footprint, providing a regional benchmark.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/fujijuken_
• YouTubeyoutube.com/channel/UCvqseyg-8OJ5SZ_XGGLIS0A
• Instagraminstagram.com/fujijuken_
• Facebookfacebook.com/fujijuken

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries4 records

Funding overview

Funding rounds

Investors

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 Fuji Juken