Trust Home

What Trust Home does

Trust Home (株式会社トラストホーム, founded 2004) is a privately held regional custom home builder headquartered in Inashiki City, Ibaraki Prefecture, Japan, operating a single showroom within the Ibaraki–Chiba border area of the Kanto region. The company designs and constructs fully customized detached houses (完全自由設計) primarily for families, allergy sufferers, and health-conscious homebuyers, and offers land search assistance, free estimates, and bespoke floor-plan design as part of a roughly four-to-five-month build cycle.

Its flagship offering is WB HOUSE (ダブルブリージングハウス / Double Breathing Wall House), a proprietary natural ventilation construction system that uses a vapor-permeable wall (透湿壁), a wall cavity ventilation layer (壁体内通気), and temperature-activated shape memory alloy louvers to automatically regulate indoor humidity, temperature, and chemical concentrations without any mechanical ventilation equipment. WB HOUSE holds the Ministry of Land, Infrastructure, Transport and Tourism certification RLFC-0001, the only such designation in Japan confirming that indoor formaldehyde concentrations remain below the Ministry of Health, Labour and Welfare's 0.08ppm benchmark without 24-hour mechanical ventilation. Trust Home also operates the WB HOUSE comparison experience facility (体感棟) in Inashiki City, where prospects can directly contrast air quality against a conventional high-airtightness home with ventilation disabled.

The business model is a one-time transaction per new-build project with individually quoted pricing (no public list) and a secondary revenue line from renovation/reform (リフォーム) work, often with existing customers. The go-to-market is event- and experience-driven: model house tours, owner-hosted testimonial open houses across Kamisu, Hokota, and Narita, supplemented by YouTube, Instagram, LINE, Google Ads, and active community-event participation. The firm is founder-led by Representative Director Yasuyoshi Shinotsuka (篠塚 保嘉) and operates with approximately 19 staff (16 staff plus 3 carpenters), completing roughly 14 homes per year.

Name

Trust Home

Legal name

株式会社トラストホーム

Website

https://t-trust.co.jp

Company type

Private

Founded year

2004

Operating status

Operating

Short description

Trust Home is a privately held Japanese regional custom home builder (founded 2004, Ibaraki Prefecture) that designs and constructs fully tailored detached houses using its proprietary WB HOUSE natural-ventilation system, exclusively certified (MLIT RLFC-0001) to maintain clean indoor air without mechanical ventilation, serving families in the Ibaraki–Chiba border area.

Ownership category

akta.pro rank

Product category

Custom Home Construction

NAICS

New Single-Family Housing Construction (except For-Sale Builders) (236115), Residential Remodelers (236118), Residential Building Construction (23611)

SIC

General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Custom Home Building (IMAFABAC)

akta.pro secondary industries

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE), Residential Green / High-Performance Home Construction (Net-Zero, Passive House) (IMAFABAH), Whole-Home Interior Renovation (Non-Structural) (HSAPAEAC)

Keywords

• Custom home construction
• Natural ventilation housing
• WB HOUSE building
• Detached house builder
• Healthy indoor air housing

Headquarters

HQ city

Inashiki

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Custom Built Home Sales (注文住宅の新規販売): Trust Home's primary revenue stream comes from designing and constructing fully customized detached houses (完全自由設計). Revenue is realized upon completion and handover of a new home. Pricing is individualized based on specifications, land, and design choices. The company also offers land search assistance as part of the service.
2. Reform/Renovation Services (リフォーム・リノベーション): The company provides renovation and reform services for existing homes, complementing the new home sales business. These are often recurring engagements with existing customer base.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels8 records

Core offering

Trust Home designs and constructs fully customized detached houses for individual buyers in the Ibaraki and Chiba prefectures of Japan, anchored by its flagship WB HOUSE system which maintains clean indoor air without mechanical ventilation. The company offers complete custom-design home construction from land search and architectural design through handover, and supplements this with renovation and reform services for existing homeowners.

Product overview

Trust Home (株式会社トラストホーム) is a custom home construction company headquartered in Inashiki City, Ibaraki Prefecture, operating since 2004. The company's core product is WB HOUSE, a proprietary natural ventilation house system that uses a breathing wall structure with shape memory alloy technology to automatically regulate indoor air quality and temperature without mechanical ventilation. This certified system maintains indoor formaldehyde levels below 0.08ppm without any mechanical ventilation equipment. Trust Home complements WB HOUSE with fully custom-designed detached houses, renovation/reform services, and operates model house facilities with experience comparison rooms. The company serves customers across Ibaraki and Chiba prefectures through a complete home building process including land search assistance, design consultation, construction, and after-sales support.

Differentiator

Problem solved

Functional benefit

Brands

• WB HOUSE: A custom home construction method certified by Japan's Ministry of Land, Infrastructure, Transport and Tourism that provides clean indoor air without mechanical ventilation through natural ventilation and humidity control using shape memory alloys.

Products and services

• WB HOUSE Custom Home (ダブルブリーズハウス) Trust Home's flagship fully customized detached house featuring a proprietary natural ventilation construction system. WB HOUSE uses a vapor-permeable wall combined with wall-cavity ventilation regulated by shape memory alloy automatic dampers to maintain clean indoor air (formaldehyde below 0.08ppm) without any mechanical ventilation, certified by Japan's Ministry of Land, Infrastructure, Transport and Tourism (RLFC-0001). Targeted at families and individuals in the Ibaraki/Chiba Kanto region who want a health-focused custom home.
• Fully Custom Design Construction (完全自由設計の注文住宅) End-to-end custom-design detached house construction for individual buyers, covering land search, architectural design, construction, and after-sales support. Customers work with Trust Home to determine floor plans, specifications, and budget before receiving cost estimates. Targeted at families and individuals in the Ibaraki/Chiba region who want a custom home without the constraints of mass-producer plans.
• Reform / Renovation Services (リフォーム・リノベーション) Renovation and reform services for existing homes, including full renovation projects and partial repair/reform work. Targeted at homeowners in the Ibaraki/Chiba region who already own a property and want to improve ventilation, materials, and comfort without full reconstruction. Available government subsidy support (2026 housing energy-efficiency reform subsidy) is processed by Trust Home.
• WB HOUSE Comparison Experience Facility (WB HOUSE 体感棟) Showroom and experience facility at Trust Home's Inashiki City headquarters where prospective buyers can tour a WB HOUSE model home and use a dedicated comparison experience room (with mechanical ventilation stopped) to feel the air-quality difference between WB HOUSE and a standard high-airtightness home. Targeted at prospective custom-home buyers in the Ibaraki/Chiba region during the pre-purchase consideration phase.
• ZEH (Net Zero Energy House) Construction Custom home construction meeting Japan's Net Zero Energy House (ZEH) government energy-efficiency standard, available as part of Trust Home's home building offerings. Targeted at energy-conscious home buyers in the Ibaraki/Chiba region.

Quantifiable outcome

• Indoor formaldehyde concentration maintained below 0.08ppm (Ministry of Health, Labour and Welfare benchmark) without mechanical ventilation — certified by Ministry of Land, Infrastructure, Transport and Tourism
• +2 more outcomes

Named customers5 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• スウェーデンハウス (Sweden House): Japanese custom home builder specializing in high-performance, well-insulated timber homes imported from a Nordic design tradition. Comparable to Trust Home in its premium positioning, focus on indoor air quality and energy performance, and reliance on differentiated construction technology rather than price competition.
• 桧家住宅 (Hinokiya): Mid-sized Japanese custom home builder known for technology-driven housing (e.g., smart homes, high-insulation envelopes) and regional franchise-style operations. Comparable in its custom-build model, proprietary technology focus, and Japanese regional custom-homebuyer target segment.
• アエラホーム (Aera Home): Japanese custom home builder with strong emphasis on energy efficiency, high thermal insulation, and healthy indoor environments. Comparable to Trust Home in marketing high-performance / healthy-home value propositions to Japanese families building custom detached houses.
• クレバリーホーム (Clevery Home): Franchise-based Japanese custom home builder focused on tile-exterior, high-insulation detached homes. Comparable as a regional-channel Japanese custom builder serving families with technology-differentiated housing.

Broad incumbents

• ミサワホーム (Misawa Home): National Japanese homebuilder with strong technology platform (e.g., wood-frame, smart home, energy efficiency). Comparable as a Japanese custom detached-home provider using proprietary construction methods, but at materially larger scale than Trust Home's regional operation.
• パナホーム / Panasonic Homes: National Japanese homebuilder with a heritage in energy-efficient and technology-driven housing (now under Panasonic). Comparable in its energy-efficiency and technology positioning targeting Japanese homebuyers, though at much larger scale and broader product portfolio.
• 三井ホーム (Mitsui Home): National Japanese custom home builder with proprietary 2x6 timber-frame construction technology. Comparable in delivering technology-differentiated custom detached homes to Japanese families, but operates nationwide and serves a broader price tier than Trust Home.
• 一条工務店 (Ichijo Komuten): Largest-volume Japanese custom home builder with a heavy emphasis on insulation performance, energy efficiency, and in-house R&D. Comparable in product category (custom detached homes in Japan) but operates at national scale versus Trust Home's regional footprint.
• 積水ホーム (Sekisui Heim): Major national Japanese homebuilder with a unit-construction technology platform. Comparable in serving Japanese families seeking custom detached housing with proprietary construction methods, but at materially larger scale and broader geographic reach.
• 住友林業 (Sumitomo Forestry): Large Japanese homebuilder with a wood-timber heritage and emphasis on natural materials and structural quality. Comparable in its positioning around natural materials and craft-quality custom detached housing, though at national scale and with significant custom-build capacity.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCQ9pJ4vZ3Q0d_xlN5GqJ3Yw
• Instagraminstagram.com/trusthome.inashiki

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Trust Home