株式会社トキワ

What 株式会社トキワ does

株式会社トキワ (Tokiwa Co., Ltd.) is a privately held Japanese custom homebuilder headquartered in Nagano City, Nagano Prefecture. The company traces its origin to 1927, when it was founded as Usui Lumber Store (臼井材木店); it was renamed Tokiwa in 1973, merged into Torii Kasei Co., Ltd. in 1990, and was spun off as an independent entity in December 2006. It primarily serves individual homebuyers and households in the Nagano Prefecture region, with particular focus on Nagano City and surrounding municipalities such as Toyono-cho, Iizuna Town, Chikuma City, and Ueda City.

The company's flagship offering is the Sumori no Ie (スモリの家) line of custom-built homes, constructed using the proprietary Sumori Method (スモリ工法 / 真壁外断熱工法). This method combines a traditional post-and-beam external insulation structure with a patented Ginga Panel (銀我パネル) — a shear wall component reportedly delivering approximately 2.5x the strength of conventional diagonal bracing while simultaneously functioning as the building's thermal insulation layer. Completed homes are equipped with a whole-building HVAC system featuring heat-exchange ventilation designed to maintain uniform temperatures across floors and rooms using a single air conditioning unit per floor. The company also sells residential subdivided land in its Toyono-cho (豊野町) development, designs custom furniture, and offers renovation and seismic reinforcement services. A unique "middle 2nd floor" (中2階) configuration provides flexible additional space without requiring a full additional floor.

Tokiwa operates a direct-to-consumer sales model with no third-party distribution channels. Revenue is generated primarily through one-off new construction contracts, land parcel sales tied to building agreements, renovation services, and custom furniture orders. Go-to-market is sales-led and event-driven, centered on the company's "Tokiwa House" (ときわ家) showroom, seasonal land-search and craft workshops, completion home tours, and structural observation events. The firm employs approximately 24 people, of whom four are publicly named on the staff page (Representative Director/CEO, Department Manager, Section Manager, and Supervisor). The company is privately held, with no disclosed institutional investors or public listing.

Name

株式会社トキワ

Legal name

株式会社トキワ

Website

https://tokiwa-home.jp

Company type

Private

Founded year

1927

Operating status

Operating

Headcount range

11–50 employees

Short description

Tokiwa Co., Ltd. (株式会社トキワ) is a privately held Nagano, Japan-based custom homebuilder founded in 1927, specializing in proprietary Sumori Method high-airtightness, earthquake-resistant custom homes using its patented Ginga Panel technology for individual homebuyers in Nagano Prefecture.

Ownership category

akta.pro rank

Product category

Custom Home Construction

NAICS

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

SIC

Land Subdividers & Developers (No Cemeteries) (6552)

akta.pro primary industry

Custom Home Building (IMAFABAC)

akta.pro secondary industry

Whole-Home Interior Renovation (Non-Structural) (HSAPAEAC)

Keywords

• Custom home construction
• High-insulation housing
• Earthquake-resistant construction
• Whole-building HVAC
• Residential renovation

Headquarters

HQ city

Nagano City (長野市)

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. 新建住宅販売 (New Residential Construction Sales): Design and construction of custom-built 'スモリの家' (Sumori no Ie) houses. Houses are built to order for individual customers using the company's proprietary Sumori Method construction. Pricing based on land + building packages or building-only contracts. Sales made directly to end consumers.
2. 不動産取引 (Real Estate Trading): Purchase, development, and sale of residential land (分譲地). Company acquires land, develops it into subdivided residential plots, and sells to homebuyers with building construction agreements attached. Also handles purchase and resale of existing properties.
3. リフォーム・リノベーション (Reform/Renovation): Renovation and remodeling services for existing homes. Includes energy-saving retrofits, seismic reinforcement, termite treatment, and aesthetic renovations. Leverages the company's high airtightness/high insulation expertise.
4. オーダーメイド家具 (Custom Furniture): Bespoke furniture design and manufacturing using high-quality lumber, made to order for customers' specific spaces. One-off custom pieces tailored to individual rooms and preferences.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

株式会社トキワ designs and builds custom residential homes under the Sumori no Ie (スモリの家) brand using its proprietary Sumori Method (真壁外断熱工法) construction with the patented Ginga Panel (銀我パネル) structural insulation system. The company also sells subdivided residential land in Nagano City Toyono-cho and provides renovation services, operating entirely within Nagano Prefecture, Japan.

Product overview

株式会社トキワは長野県長野市に本社を置く注文주택建設会社（従業員数非公表）。主力ブランド「スモリの家」は、同社独自の「スモリ工法（真壁外斷熱工法）」に基づく高気密・高斷熱・地震に強い住宅シリーズで、 특허取得の「銀我パネル」と「気密パッキン」を核とする。スマ木工法を構成する主要製品・サービスとして、全館冷暖房空调システムが全館统一的温度管理を提供し、「中2階のある家」が限られた敷地面積での空間有効活用を実現する。不動産事業では長野市豊野町に造成した分譲地（伊薙毛分譲地：A〜I区画）を販売하며、 개혁・リノベーション服務も手がける。

Differentiator

Problem solved

Functional benefit

Products and services

• Sumori no Ie (スモリの家) — Custom Home Construction Flagship custom home construction service for individual homebuyers. Each home is built to order using the company's proprietary Sumori Method, combining post-and-beam architecture with the patented Ginga Panel structural insulation system and airtightness gaskets to deliver high airtightness, high insulation, and earthquake resistance. Designed for families and individuals in Nagano Prefecture seeking long-term comfortable, energy-efficient custom housing.
• Whole-Building HVAC System (全館冷暖房空調システム) Integrated whole-building heating, cooling, and ventilation system maintaining consistent temperature across every room (1st floor, 2nd floor, bathroom, toilet) year-round using a single AC unit per floor. Incorporates heat-exchange ventilation (第1種換気・熱交換型). High airtightness of the Sumori construction keeps utility costs low. Included as a defining feature of the Sumori no Ie custom home offering.
• Middle 2nd Floor Home (中2階のある家) Optional home design that incorporates an intermediate floor (中2階) between the 1st and 2nd floors, used as a study, storage, or children's play area. Effectively adds a flexible private space without the cost or footprint of a full additional floor. Offered as part of the Sumori no Ie custom home line for buyers wanting an extra room without expanding the building footprint.
• Toyono-cho Izu Ke Subdivision Land (豊野町 伊豆毛分譲地) Residential subdivision land in Nagano City Toyono-cho, developed and sold directly by Tokiwa. Plots (A through I 区画) range from approximately 52.5 to 102.0 tsubo, sold with conditions attached for new home construction. Located within a 5-minute walk of JR Toyono Station. Targeted at homebuyers planning to build a new Sumori no Ie home.
• Reform/Renovation (リフォーム) Renovation and remodeling service for existing homes, leveraging Tokiwa's 90+ years of construction expertise. Includes energy-saving retrofits, seismic reinforcement, insulation upgrades, and termite treatment. Services are tailored to the customer's lifestyle.

Quantifiable outcome

• Airtightness (C-value) as low as 0.25 cm²/m² measured on completed homes
• +4 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators3 records

Recent moves2 records

Expansion highlights3 records

Market position

Strengths4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCrOGne4dsMe_OQNHAazAh_w
• LinkedInlinkedin.com/company/%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE%E3%83%88%E3%82%AD%E3%83%AF

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 株式会社トキワ