ENVALITH
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Yamadai Corporation

7426・Standard Market・Wholesale Trade

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株式会社山大 logo
Yamadai Corporation7426

Business

Sandai Co., Ltd. was founded in 1964 and is headquartered in Ishinomaki City, Miyagi Prefecture, listed on the TSE Standard Market as a timber and wooden-construction company. It comprises three segments: the Housing Materials Business (wholesale, processing, and precut of timber and construction materials), the Construction Business (design and construction of Custom-Built Wooden Houses and Large-Scale Wooden Construction), and the Leasing Business (Real Estate Leasing). The company maintains an integrated system spanning afforestation and cultivation in its own forests, processing at its sawmill "Wood Mill," structural material processing at its precut plant, and housing construction and after-sales service. Its main customers are local construction firms, homebuilders, and individual homeowners. In November 2024, the company made BLC Corporation a wholly owned subsidiary, incorporating interior building materials sales functions.

Business Model

In the Housing Materials Business, the company sells in-house sawn and precut products along with procured building materials to local construction companies, accumulating both manufacturing and distribution margins. In the Construction Business, it earns construction profit through design and construction contracting for Custom-Built Wooden Houses and Large-Scale Wooden Construction. In the Leasing Business, it secures stable rental income from self-owned real estate. The company differentiates itself through its "Miyagi no Date na Sugi" brand of kiln-dried cedar produced in Miyagi Prefecture, and also promotes sales by qualifying properties for subsidy eligibility.

Company Strengths

The company has built a system in which it independently completes everything from afforestation and cultivation at its own forests, to sawmilling of domestic cedar at its sawmill "Wood Mill," to structural material processing at its precut plant, to house construction and after-sales service. This integrated system, functioning as a capital-intensive industry that is difficult for competitors to replicate in a short period, forms a competitive advantage in both quality control and cost management.

The company owns the German-made high-performance wood processing machine Hundegger K2i 1250, giving it the processing capability to handle non-residential large-scale wooden construction such as the ATA hybrid construction method and CLT. In January 2026, it concluded a business partnership agreement (through January 2031) with Nice Corporation for the precut business, strengthening its stable supply system for domestic timber.

Kiln-dried cedar lumber products from Miyagi Prefecture, sold under the brand "Miyagi no Date na Sugi," are produced at the "Wood Mill" sawmill (in operation since 2007) and its second plant (in operation since 2016). The company has built its sales foundation through collaboration with the "Association for Creating Miyagi no Date na Sugi Houses" and by having properties qualify for subsidies under the Regional Housing Greening Project and the Prefectural Timber Utilization Sustainable Housing Promotion Project.

ENVALITH's Perspective

The operating loss for FY2026 (ending March 2026) narrowed to ¥286 million from ¥375 million in the previous period, and net loss for the period also improved significantly to ¥280 million (from ¥1,436 million in the previous period). However, the expansion of net loss in the previous period was due to a special factor—an impairment loss of ¥1,114 million—so the improvement in actual business earning power is limited. Net sales also declined 0.9% year on year to ¥4,102 million, and both of the two core businesses, Housing Materials and Construction, continued to post operating losses, indicating that a structural recovery in profitability has not yet been achieved.

Regarding BLC Co., Ltd., which became a consolidated subsidiary in November 2024, the company recognized an impairment loss on fixed assets of ¥12 million and a full impairment of the remaining unamortized goodwill balance (¥13 million) after just one fiscal period. The fact that a deviation from the business plan at the time of acquisition became apparent so quickly could raise questions about the effectiveness of pre-acquisition due diligence and post-merger integration (PMI) management. The overdraft facility limit also shrank from ¥1,950 million in the previous period to ¥1,550 million, warranting continued attention to the relationship with financial institutions.

For FY2026 (ending March 2026), the number of new housing starts nationwide was 710 thousand units (down 12.8% year on year), and wooden housing starts were 420 thousand units (down 9.5% year on year), reflecting continued weak demand in the market environment. On the other hand, the external factor of promoting wooden construction in non-residential buildings under the revised Act on Promotion of Use of Wood in Buildings (enforced in October 2021) could function as a tailwind. For FY2027 (ending March 2027), the company forecasts net sales of ¥4,678 million (up 14.0% year on year), but with an operating loss of ¥68 million, an ordinary loss of ¥94 million, and a net loss for the period of ¥97 million, a return to profitability is not yet in sight, requiring careful assessment of the feasibility of these forecasts.

Growth Strategy

Three pillars: capturing demand for wooden construction in the non-residential sector, strengthening precut operations through the Nice Corporation partnership, and deepening the local-production-for-local-consumption brand

Through a business alliance with Nice Corporation, the Company is promoting stronger collaboration in the Precut Processing Service and building a stable supply system for domestic timber. This aims to strengthen the competitiveness of the Housing Materials Business and manage material procurement costs stably. It is a key assumption underlying the projected sales of ¥4,678 million for FY2027 (ending March 2027).

By making maximum use of the Hundegger K2i 1250, the Company is strengthening sales activities in the Large-Scale Wooden Construction field for non-residential use, including the ATA Hybrid construction method and CLT. The Company is also expanding its high-performance beam-and-column processing machinery to build a system that can flexibly respond to market needs. The expansion of demand for wooden construction in the non-residential sector under the revised Act on Promotion of Use of Wood in Buildings is an external tailwind.

The Company promotes the sale and adoption of domestically kiln-dried cedar lumber, "Miyagi no Date na Sugi," produced at its own sawmill, "Wood Mill," in cooperation with the "Association for Creating Homes with Miyagi no Date na Sugi" and others. The Company aims to differentiate itself and address SDGs through the use of forest-certified timber and legal timber (under the Clean Wood Act).

Regarding BLC Corporation, which became a consolidated subsidiary in November 2024, the Company recorded impairment losses on fixed assets and goodwill just one fiscal period after the acquisition. Resolving the ongoing operating losses and rebuilding the business plan are urgent priorities. Realizing the synergy effects needed to improve profitability in the Housing Materials Business segment remains a challenge.

Last updated: July 19, 2026