BUSINESS HIGHLIGHTS for the first half of the financial year ending March 31, 2026

November 6, 2025

N i te rra Co., Ltd.

▍ Financial Results of FY2025 H1

− Sales reached record highs in the FY2025 H1.

− Operating profit remained the same level as the previous fiscal year for the reason of the effects of FOREX by the shift to yen appreciation and temporary expenses.

− In the automotive business, the effects on demand by US tariff measures remains uncertain. The sales volume increased YoY, and the sales amount also increased by passing on price increases according to a plan.

− Interim dividend has increased by 2 yen from the initial forecast to 93 yen per share (5 yen dividend increase from the previous fiscal year).

▍ Financial Plan for FY2025

− Both of the sales revenue and operating profit forecasted at the beginning of this fiscal year will be kept unchanged.

− FOREX assumption has been revised as described below:

1 US dollar = 145 yen (initial forecast: 140 yen), 1 Euro = 170 yen (initial forecast: 155 yen).

− We are planning to increase the full year dividend by 4 yen and pay 186 yen per share (8 yen dividend increase compared to that of the previous year).

Key Business Highlights

1. Financial Results of FY2025 - H1

2. Annual Plan for FY2025
3. Shareholder Return

Contents

− Sales revenue increased YoY. Operating profit decreased mainly for the reasons of the shift to yen appreciation and temporary expenses.

(Billion yen)

1 Financial Results of FY2025 - H1

− In the automotive business, the sales revenue increased YoY for the reasons that the sales both in OEM assembly and AM products increased in addition to the steady implementation of price increase responding to inflation

and US tariff measures.

− In the component solution business, the sales revenue increased YoY for the reasons that the demand in SPE business increased. The sales of Niterra Materials included as our consolidated subsidiary from this fiscal year also contributed to business improvement.

（Billion yen）

Component solution

Sensors

Spark plugs

Niterra Co., Ltd. All Rights R

4.5

eserved

FY2024 H1

FY2025 H1

Spark plug

182.4 billion yen ➡

189.3 billion yen

Sensor

88.4 billion yen ➡

95.8 billion yen

Component solution

49.8 billion yen ➡

61.4 billion yen

• Sales revenue increased by 4% YoY.

• Sales volume increased both in OEM assembly and AM products.

• The implementation of price increase also contributed to boost it to the record high level.

• Sales revenue increased by 8% YoY.

• It increased YoY for the reason of the increase in demand in response to OBD II regulation in India.

• It increased by 23% YoY.

• In SPE business, it has increased YoY with the increase in demand for generative AI related and advanced logic semiconductor.

• In the silicon nitride business, the sales of Niterra Materials included as our consolidated subsidiary from this fiscal year contributed to business increase.

  4

  1 Financial Results of FY2025 - H1

  Sales Revenue
  
  
  

  − The production volume of ICE vehicles decreased by 3.5% YoY.

  − In both our spark plugs and sensors for exhaust gas, the sales volume increased YoY. The sales amount also increased YoY by passing on price increases.

  ▍ Sales Volume and Amounts By Region: FY2024 H1 vs FY2025 H1

  Region	ICE Automotive Production Volume (Niterra estimation)	Sales Amounts (Exclude FOREX)		Sales Volume
  		Spark plugs	Sensors	Spark plugs		Sensors for exhaust gas
  				OEM	AM
  North America	- 6.3 %	+ 17.6 %	+ 6.6 %	+ 0.1 %	+ 10.5 %	+ 2.1 %
  Europe	- 9.0 %	+ 6.5 %	+ 1.8 %	- 1.3 %	+ 0.6 %	+ 3.3 %
  China	+ 4.7 % (-1.9 %) ※1	＋ 6.7 %	- 2.7 %	+ 6.8 %	- 0.6 %	+ 1.8 %
  South East Asia	- 5.6 %	＋ 2.9 %	※2	※3	+ 1.5 %	※2
  India	-14.2 %	※3	+ 104%	※3	※3	+87.3 %
  Global Total	- 3.5 %	+ 10.2 %	+ 3.5%	+ 3.4 %	+ 5.0 %	+ 2.0%

  • 1. ICE vehicle production by Japanese, European and American automobile makers, which are Niterra's customers in China.

  • 2. In the sensor business, the proportion of sales in South East Asia to the global sales is low.

  • 3. In the plugs business, proportion of sales from OEM business in Southeast Asia and the Indian market is low.

  Niterra Co., Ltd. All Rights Reserved 5

  1 Financial Results of FY2025 - H1

  Automotive Components - Results of Sales Volume and Amounts (YoY)
  
  
  

  − In the automotive components business, excluding the effects of FOREX, the operating profit increased covering the temporally expenses; However, it slightly decreased YoY including the effects of FOREX.

  − In the component solution business, it increased YoY with the recovery from production adjustment in SPE business.

  （Billion yen）

  72.2 71.9
  Automotive components
  
  

  71.9

  70.6

  -1.2

  0.7

  71.9 Billion yen ➡

  70.6 Billion yen

  • It decreased YoY due to the effects of yen appreciation and temporary expenses including allowance for competition- law-related items.

  • Excluding the effects of FOREX, it increased YoY for the reasons of steadily sales increase in existing customers and implementation of price increases as planned.

    Spark plugs

    Component

    Component solution

    -1.2 Billion yen ➡

    0.7 Million yen

    • In the SPE business, it increased YoY with the recovery from production adjustment in the previous fiscal year.

    • In the silicon nitride business, it slightly increased YoY by including Niterra Materials as our consolidated subsidiary.

    • In the medical business, it decreased YoY for the low sales in US and Europe.

solution

FY2024

FY2025

Niterra Co., Ltd. All Rights Reserved H1 H1 6

1 Financial Results of FY2025 - H1

− The impact of US tariff measures reduced to -0.6 billion yen for the reasons of the decrease in tax rates, the delay in the effective timing, and the effects of inventory status.

− The operating profit increased both in the automotive and SPE businesses on the basis of actual performance.

However, there were some factors contributing to profit decline such as the impact of yen appreciation and temporary

expenses.

-2.2

72.2

70.0

-3.5

-0.9

-3.7

10.4

3.6

75.9

-2.5

-0.9

-0.6

（Billion yen）

71.9

OP margin 22.3％

OP margin 21.6％

OP margin 21.6%

OP margin 20.5％

1 Financial Results of FY2025 - H1

− Operating profit increased for the reasons that the impact of US tariff measures was reduced by the decrease in tax rates, the delay in the effective timing, and the effects of inventory status in addition to the effects of FOREX.

6.5

4.2

-1.4

2.5

-0.6

0.2

-2.5

2.1

（Billion yen）

61.0

71.9

OP margin 18.1％

OP margin 20.5％

FOREX

FY2025 H1

(Initial forecast)

Impact of US tariff

Material and energy cost

Labor expenses

Sales increase & product composition

Price increase

(to inflation)

Temporary factors

Specific project

FY2025 H1

results

1 Financial Results of FY2025 - H1

▍ FOREX Impact （Impact on operating profit）

※ The FOREX Impact Includes the positive impact of 1 billion yen of raw materials purchased in US dollars.

1 Financial Results of FY2025 - H1