Aoi Construction Co

What Aoi Construction Co does

Aoi Construction Co., Ltd. (アオイ建設株式会社) is a privately held Japanese residential homebuilder founded in 1972 and incorporated in 1974, headquartered in Sagamihara, Kanagawa Prefecture, with 51–100 employees. The company designs and constructs custom-built (注文住宅) and pre-built / subdivided (分譲住宅) single-family homes in the Sagamihara–Atsugi–Machida corridor, targeting individual owner-occupier buyers in Kanagawa Prefecture and Tokyo. Since 2018, the company has operated as a group company of First Seki Jutaku Co., Ltd. (ファースト住建株式会社), a Kansai-based subdivided housing developer, which provides land-bank and development resources supporting Aoi Construction's Kanto expansion.

The company's core products are custom-designed homes (with designer-led bespoke floor plans), a pre-built/sold home line under the AOI STYLE sub-brand, and the cost-positioned AOI Home Fit and SMART semi-custom lines introduced in 2023–2024. All homes are built using wooden frame construction (木造軸組工法) and ship with standardized high-performance features: spray foam insulation (吹付断熱), seismic dampers (制震ダンパー), argon-filled aluminum-resin composite windows achieving insulation grade 5, and IoT-based smart home integration via LIXIL Life Assist2 with Amazon Alexa voice control. Supporting services include direct land purchase (土地高価買取), guaranteed sale with intermediation, and an after-sales support program. The company is ZEH builder/planner registered, holds third-party residential performance evaluations (設計性能評価 / 建設性能評価) on all subdivided housing, and offers a 20-year ground warranty up to ¥50M.

Aoi Construction makes money primarily through one-time project-based sales of homes (¥17.3M–¥50M+ per unit, varying by customization, land, and segment), supplemented by land brokerage and buyback transaction fees. Distribution is direct-to-consumer via model house showrooms in Sagamihara and Atsugi, three physical branches (HQ Sagamihara, Atsugi branch opened Aug 2021, Machida branch opened Oct 2024 as the first Tokyo location), three dedicated websites, an active Instagram presence, real-estate broker partner portal, and on-site seminars. Following the 2022 CI/VI refresh for the 50th anniversary, the company has explicitly targeted becoming a "100-year enterprise" through continued Kanto-area geographic and product-line expansion.

Name

Aoi Construction Co

Legal name

アオイ建設株式会社

Website

https://aoi-cnst.co.jp

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

51–100 employees

Short description

Aoi Construction Co designs and builds custom and pre-built single-family homes in Japan's Sagamihara–Atsugi–Machida corridor. A subsidiary of First Seki Jutaku since 2018, it serves individual home buyers with ZEH-grade insulation, seismic, and IoT-smart-home features via three branches and dedicated sales websites.

Ownership category

akta.pro rank

Headquarters

HQ city

Sagamihara

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Custom Home Sales (注文住宅): Fully custom-designed homes built to individual customer specifications. Customers work with designers to create bespoke floor plans, select materials and finishes. Revenue is generated from the total construction cost including land if purchased through the company.
2. Pre-built Home Sales (分譲住宅): Company develops and sells completed or under-construction homes on company-owned land. Multiple model options available with standardized features. Sales are handled directly by company sales staff.
3. Land Acquisition Services (土地高价收购): Company purchases land directly from sellers, providing quick cash transactions. This supports both the company's land bank for development and serves customers looking to sell property.
4. Semi-Custom Home Sales (規格住宅/セミオーダー): New product line 'AOI Home Fit' combining custom floor plans with pre-selected specifications, offering shorter construction periods and competitive pricing while maintaining design flexibility.
5. Land Brokerage (土地仲介): Real estate intermediation services for customers buying or selling land, leveraging the company's 50+ years of local market expertise in Sagamihara area.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

Aoi Construction Co designs, builds, and sells residential homes in Kanagawa Prefecture and Tokyo, offering both fully custom-built homes (注文住宅) and pre-built/subdivided homes (分譲住宅) using wooden frame construction. The company also provides complementary real estate services including direct land purchase (高価買取), land brokerage (仲介), and post-purchase after-sales support. Homes are sold through company-owned model houses, dedicated websites, and a broker partner portal.

Product overview

Aoi Construction Co operates two core housing products: custom-built homes (アオイの、注文住宅) and subdivided/built-for-sale housing (アオイの分譲住宅), both branded under the 'Aoi Style' umbrella. The custom home business leverages over 50 years of local expertise to deliver bespoke residences, while the subdivided housing arm applies the same quality standards to planned multi-unit developments. Supporting services include land buyback, guaranteed intermediation, after-sales support, and a dedicated model house. The company recently introduced sub-brands SMART (semi-custom) and AOI Home Fit to address cost-conscious segments, alongside a ZEH-compliant energy-efficient housing program.

Differentiator

Problem solved

Functional benefit

Brands

• AOI Home Fit: AOI HOME FIT는 합리적인 가격대를 갖추면서도 자유 설계와 고스펙의 주택 성능을 표준으로 제공하는 새로운 상품 라인.
• アオイスタイル (AOI STYLE)

Products and services

• Custom-Built Homes (注文住宅) Individually designed custom-built homes tailored to each customer's specific needs and lifestyle, utilizing 50+ years of Sagamihara-area expertise. Customers work with in-house designers to create bespoke floor plans and select materials and finishes.
• Pre-Built / Subdivided Homes (分譲住宅)
• AOI Home Fit (semi-custom housing) New semi-custom home product line launched in 2024 offering ZEH-level insulation (insulation grade 5) and earthquake resistance grade 3 at a competitive price point. Combines custom floor plan freedom with pre-selected standardized specifications for shorter construction periods.
• Land Purchase / Buyback Service (土地高価買取)
• Guaranteed Sale with Intermediation (買取保証付き仲介)
• After-Sales Support (アフターサポート)
• Land Brokerage Services (土地仲介)

Quantifiable outcome

• ZEH-level insulation (insulation grade 5) and seismic grade 3 as standard across all homes
• +1 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature4 records

Partnerships

One partnership is on record.

• First Seki Jutaku Co., Ltd. (ファースト住建株式会社)majorOthers · 1 January 2018First Seki Jutaku Co., Ltd. acquired Aoi Construction as a group company in 2018. The parent company is primarily focused on pre-built home development in the Kansai region. This acquisition provided Aoi Construction with additional resources and land acquisition capabilities, enabling accelerated growth in the Tokyo metropolitan area.

Scale indicators3 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• First Seki Jutaku Co., Ltd. Parent company of Aoi Construction since 2018, focused on pre-built (bunjoh) home development primarily in the Kansai region. Directly comparable business model and product offering; provides Aoi with land acquisition and development capability.

Broad incumbents

• Daiwa House Industry: Japan's largest homebuilder offering custom, spec, and prefab homes nationwide. Comparable in product categories but operates at vastly greater scale with factory-supplied components, broader geographic coverage, and stronger procurement leverage.
• Sekisui Heim: Major unit-type (prefab/modular) home manufacturer under Sekisui Chemical. Competes across the custom and pre-built home segments with factory-built precision and seismic technology; relevant benchmark for Aoi's framing and insulation choices.
• Tama Home Co., Ltd. National Japanese homebuilder operating franchise model with strong land acquisition. Directly comparable custom and pre-built home product lines; competes for similar first-time-buyer segments in regional markets including Kanagawa.
• PanaHome Corporation (Panasonic Homes): National prefab/panel homebuilder under Panasonic. Competes in custom and pre-built housing with industrialized panel systems and integrated smart-home technology; relevant peer for Aoi's IoT/energy-efficiency positioning.
• Misawa Homes Co., Ltd. National Japanese homebuilder focused on wooden-frame and panelized construction with strong seismic and energy efficiency positioning. Overlaps Aoi on wooden construction methods and ZEH/insulation grade features.
• Asahi Kasei Homes Co., Ltd. National unit-type homebuilder known for long-life, high-durability housing. Competes in the custom/semi-custom segment with strong insulation and earthquake-resistant specifications similar to Aoi's standard features.
• Iida Group Holdings Co., Ltd. Major Japanese homebuilder operating multiple brands across custom, spec, and subdivision housing. Directly comparable business model in pre-built subdivision housing and custom home delivery.
• Toyota Home Co., Ltd. National homebuilder affiliated with Toyota Group, focused on unit-type steel-frame housing with strong seismic performance. Competes across the same product categories as Aoi, especially in higher-end custom homes.

Regional players

• Royal Home Co., Ltd. Japanese custom homebuilder operating across multiple prefectures with focus on custom and renovation housing. Comparable custom-built wooden-frame product offering; relevant mid-tier regional benchmark for Aoi's positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Instagraminstagram.com/aoi_house.u
• LinkedInlinkedin.com/company/smith-realtors

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 Aoi Construction Co