Automotive Interior and Mechanism Parts Q1 FY2027: Profit splits despite growth

All three companies reported higher sales than a year earlier, but revenue growth did not translate uniformly into higher earnings.

• Average sales growth was 8.2%. Toyota Boshoku led with a 10.1% increase, followed by NHK Spring at 8.1% and Nifco at 6.3%.
• Operating profit rose 30.0% at NHK Spring, but fell 1.6% at Nifco and 15.1% at Toyota Boshoku. Volume growth alone does not explain the gap.
• A weaker yen supported sales and foreign-exchange gains. Higher materials, labor and research and development costs, along with expenses tied to geopolitical risks, weighed on profits.
• Strong demand for HDD components used in data centers boosted NHK Spring. The companies' business portfolios, not just auto-parts demand, shaped their results.

NHK Spring had the strongest momentum among the three, with sales up 8.1% to ¥216.2 billion and operating profit up 30.0% to ¥14.4 billion. Its 6.6% operating margin also exceeded Toyota Boshoku's 3.0%.

Demand for HDD suspensions grew amid data center investment. Foreign-exchange gains and gains on securities valuations also helped lift net profit 75.2%. Automotive suspension springs, however, struggled amid U.S. tariffs and other pressures.

Toyota Boshoku faced the toughest conditions. It posted the group's largest sales, ¥528.1 billion, and the fastest growth, 10.1%. Yet operating profit fell 15.1% to ¥15.9 billion, as lower production in China and higher costs offset the revenue increase.

Nifco recorded sales of ¥90.9 billion, up 6.3%, while operating profit slipped 1.6% to ¥12.8 billion. Its operating margin, at 14.1%, was the highest of the three. The company maintained strong profitability despite higher materials and labor costs. Scale and earnings power are not the same thing.

Toyota Boshoku ranked first in both sales and operating profit by amount. Nifco led on operating margin, while NHK Spring topped the group for profit growth. The ranking changes depending on which measure of competitiveness is used.

Operating margins stood at 14.1% for Nifco, 6.6% for NHK Spring and 3.0% for Toyota Boshoku. Alongside its automotive business, NHK Spring's strong HDD-related operations supported overall results.

NHK Spring capitalized on data center demand, with its DDS business driving profits. A recovery in its suspension spring business remains a challenge. The company kept its full-year forecasts unchanged at ¥860 billion in sales and ¥59 billion in operating profit.

Nifco is continuing cost reductions to address higher materials and labor costs. It also left its full-year forecasts unchanged at ¥367 billion in sales and ¥50.8 billion in operating profit. A stock split in October and an effective dividend increase are also planned.

Toyota Boshoku turned higher production in Japan and North America, as well as yen weakness, into sales growth. Lower production in China and increased expenses weighed on profit. Its full-year forecast has been revised from the figures announced in April, but the revised details are not provided in the data.

All three companies are exposed to changes in auto production and costs, though the effects vary by business.

• Fluctuations in auto production: Production cuts in China and shifts in demand across regions affect parts shipments.
• Higher materials and labor costs: If companies are slow to pass on cost increases, earnings can shrink even as sales rise.
• Currency swings: Yen weakness can boost sales, but may be followed by reduced foreign-exchange gains or higher import costs.
• Tariffs and geopolitical risks: These are affecting NHK Spring's suspension spring business and Toyota Boshoku's costs.
• Concentrated demand: NHK Spring's DDS business is benefiting from favorable conditions, but shifts in data center investment could make results more volatile.

Even within auto parts, the work can look very different depending on a company's business mix. Toyota Boshoku is closely tied to auto production trends for interiors and seats, while Nifco focuses on resin parts and cost competitiveness. At NHK Spring, markets such as HDD-related components complement automotive parts.

When choosing an employer, look beyond products to customers and the breadth of its businesses. The ability to respond to demand shifts, and coordination across procurement, production and development, are also important considerations.