ENVALITH
株式会社TBK logo

TBK Co.,Ltd.

7277・Standard Market・Transportation Equipment

Official website
株式会社TBK logo
TBK Co.,Ltd.7277

Business

TBK Co., Ltd. is a specialized manufacturer that produces and sells automotive parts including brakes (drum brakes, disc brakes), engine water pumps and oil pumps, retarders, and other components. Founded in 1949 (established as Isuzu Parts Industry Co.), the company has a long history and holds a strong presence in critical safety components for trucks and buses, with drum brakes adopted by all major domestic commercial vehicle manufacturers. The company operates production sites across three regions—Japan, Asia (Thailand, India), and China—with major customers including Isuzu Motors, Mitsubishi Fuso Truck and Bus Corporation, Hino Motors, and Komatsu. Consolidated net sales for FY2026 (ending March 2026) were ¥54,756 million.

Business Model

TBK operates a manufacturing-and-sales model based on integrated in-house production (casting, processing, assembly) at its own plants, delivering directly to commercial vehicle OEMs both in Japan and overseas. The Japan segment accounts for approximately 59% of sales, with the Asia segment (approximately 36%) serving as the second pillar of revenue. Within the group, the Japanese parent company also supplies parts and technology to its Thai and Indian subsidiaries and receives royalties, forming a structure of intra-group technology transfer. Passing on raw material and energy cost increases to sales prices, along with cost reductions through in-house production and automation, form the main pillars of earnings improvement.

Company Strengths

The company's drum brakes are adopted by all domestic commercial vehicle manufacturers, with substantial transaction volumes with major OEMs including net sales of ¥12,003 million (21.9% of total) to Isuzu Motors and ¥4,197 million (7.7%) to Mitsubishi Fuso Truck and Bus. The company continues to invest ¥1,325 million in R&D expenses (90 research staff), advancing the expansion of next-generation lightweight, low-cost models.

The company has production sites in Japan (Kanagawa, Fukushima), Thailand, India, and China (Guangdong, Changchun), building a manufacturing framework that responds to regional demand. In November 2025, the company completed the liquidation of its unprofitable North America site (TBK America, Inc.), transferring core products to its Indian subsidiary to improve production efficiency. Capital expenditures for FY2026 (ending March 2026) totaled ¥3,260 million (Japan ¥1,717 million, Asia ¥1,412 million), continuing an active investment stance.

In November 2025, the company concluded a capital and business alliance with Brakes India Private Limited, a major Indian brake manufacturer (increasing capital stock and capital surplus by ¥568 million each through a third-party allotment of shares). The alliance aims to expand the brake product lineup, collaborate in the electrification product field, and strengthen competitiveness in the Asian market, with the equity ratio improving to 55.5%. Through technological and capital collaboration with an external partner, the company has established a framework to secure a pace of development that would be difficult to achieve alone.

ENVALITH's Perspective

Operating profit for FY2026 (ending March 2026) improved further to ¥1,496 million (up 59.0% year on year), but special losses of ¥1,042 million, including business restructuring losses of ¥297 million and impairment losses of ¥712 million associated with the liquidation of TBK America, weighed on results, resulting in a net loss attributable to owners of the parent of ¥131 million—a loss in two of the past three fiscal years. The recording of ¥502 million in income tax adjustment expenses also pressured net profit. With special losses expected to run their course, the company forecasts net profit of ¥600 million for FY2027 (ending March 2027), making a return to profitability a key test.

Cost of sales for FY2026 (ending March 2026) came to ¥47,931 million (cost of sales ratio of 87.5%), improving from 89.4% in the previous period, lifting the gross profit margin to 12.5%. Selling, general and administrative expenses increased to ¥5,329 million, but the operating profit margin recovered to 2.7%. The financial targets under the 16th Medium-Term Management Plan are an operating profit margin of 3–5% and ROE of 5%, and continued cost reduction and price pass-through will be essential to close the gap from the current 2.7%. As an external risk factor, sustained high raw material and energy prices could continue to constrain improvement in the cost structure.

The China segment posted revenue of ¥6,194 million (up 21.2% year on year), an increase in sales, but recorded a segment loss of ¥107 million for the second consecutive period. Prolonged elevated raw material prices and intensifying price competition are hindering a recovery in profitability. In addition, on May 25, 2026, an accounting error related to the liquidation procedures of an overseas consolidated subsidiary (TBK America, Inc.) came to light, prompting a correction of the earnings report. Corrections were made to foreign exchange gains, business restructuring losses, and other items, which may lead to stricter investor scrutiny of internal controls and disclosure quality.

Growth Strategy

Under the 16th Medium-Term Management Plan, the company aims to achieve an operating margin of 3-5% through three pillars: strengthening core technologies, expanding profitability in Asia, and challenging new business domains

While maintaining and strengthening technological advantages in critical safety components such as drum brakes, the company continues to pass on rising raw material and energy costs to sales prices. Japan segment profit for FY2026 (ending March 2026) improved significantly to ¥534 million (up 245.2% year on year), and capital expenditure also increased proactively to ¥1,717 million (up 75.2% year on year).

Following the completion of the liquidation of TBK America, production of key North America products has been transferred to the Indian subsidiary. Asia segment profit expanded to ¥1,232 million (up 30.2% year on year) due to improved energy procurement costs and price revisions. While awaiting a full recovery in the Thai market, the company is building a framework to capture solid commercial vehicle demand in India.

North America production ended in September 2024, and the liquidation of TBK America, Inc. was completed on November 25, 2025. Structural losses have run their course following the restructuring of unprofitable sites, allowing management resources to be concentrated in Asia and Japan. In the China segment, cost improvements such as automation continue to be promoted, but a segment loss of ¥107 million has persisted for two consecutive periods, making fundamental profitability improvement a challenge.

Under the 16th Medium-Term Management Plan, "challenging new business domains" is set as one of the basic policies, exploring responses to structural changes in the automotive industry such as the progress of electrification. The basic dividend policy is stable dividends, with a payout ratio of 40% or more continuously implemented. An annual dividend of ¥8 per share (interim ¥4, year-end ¥4) is planned for FY2027 (ending March 2027) as well.

Last updated: July 19, 2026