Environment

Boundary：

Greenhouse gas emissions include 85 consolidated subsidiaries for Scope 1 and Scope 2 emissions,

and 46 major consolidated subsidiaries for Scope 3 emissions.

Other environmental data is for major 46 consolidated subsidiaries with manufacturing facilities

Period：

April to March in each year

Data for the fiscal year ended March 2025 that is marked with ★ has been assured by a third party.

Raw material

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 consolidated

2023.4-2024.3 consolidated

2024.4-2025.3 consolidated

★Raw material input

kilotons

16,882

4,019

3,778

2,459

（Waste）

kilotons

2,085

227

210

203

（Byproducts）

kilotons

1,072

325

307

310

（Natural resources）

kilotons

13,646

3,278

3,125

1,810

（Processed items and components）

kilotons

79

189

136

136

★Percentage of recycled raw materials used

kilotons

18.7

13.7

13.7

20.9

Energy

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 consolidated

2023.4-2024.3 consolidated

2024.4-2025.3 consolidated

★Energy input

TJ

40,390

29,400

20,474

15,200

Energy input

(purchased electricity)

GWh

1,113

1,997

1,582

1,200

Energy input (fuel: crude oil equivalent)

megaliters

765

232

170

120

Non-renewable energy input

(purchased electricity)

GWh

1,093

1,945

1,367

1,060

Water

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 consolidated

2023.4-2024.3 consolidated

2024.4-2025.3 consolidated

★Total water intake
（including brackish surface water/seawater）

thousand m3

687,683

355,299

309,145

218,955

（Fresh surface water (including rainwater, wetland water, rivers and lakes)）

thousand m3

8,147

7,506

7,250

9,016

（Brackish surface water/Seawater）

thousand m3

633,852

311,712

267,765

178,320

（Groundwater (renewable)）

thousand m3

5,109

777

450

550

（Groundwater (non-renewable potential)）

thousand m3

N/A

N/A

N/A

N/A

（Associated/Incidental water）

thousand m3

N/A

N/A

N/A

N/A

（Third-party water source ）

thousand m3

40,575

35,303

33,680

31,069

★Total water discharged
（including discharged into the sea）

thousand m3

681,685

356,426

311,558

223,072

（Fresh surface water ）

thousand m3

33,261

31,024

29,966

31,505

（Brackish surface water/Seawater）

thousand m3

645,939

323,010

279,725

189,810

（Groundwater）

thousand m3

N/A

N/A

N/A

N/A

（Third-party dischargers）

thousand m3

2,485

2,393

1,867

1,756

Total water consumption※

thousand m3

5,998

-1,127

-2,413

-4,117

★BOD

t

31

283

192

177

★COD

t

27

316

276

305

★Nitrogen

t

159

287

216

226

Phosphorus

t

0

6

6

7
  • Water consumption for the fiscal years ended March 2023, 2024, and 2025 is negative due to the standard calculation method (Total water consumption = Total water intake − Total water discharged). 
    This is because the volume of wastewater discharged from mine wastewater treatment exceeded the actual  water discharged. This situation is part of our sustainable resource management and represents an exceptional case that cannot be expressed using the standard calculation method.

Emissions

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 consolidated

2023.4-2024.3 consolidated

2024.4-2025.3 consolidated

★Scope1,2 total emissions

(CO_{2} equivalent)

kilotons

7,250

1,916

1,671

1,111

（Derived from energy source）

kilotons

3,114

1,592

1,168

587

（Derived from processes）

kilotons

3,681

1

134

102

（Derived from waste*）

kilotons

434

285

369

422

（Other）

kilotons

21

38

★Scope1 emissions (CO_{2} equivalent)

kilotons

6,736

919

962

787

★Scope2 emissions

kilotons

514

997

709

324

★Scope3 emissions (CO_{2} equivalent)

kilotons

3,263

11,972

10,734

8,973

（Category 1．Purchased goods and services）

kilotons

1,563

3,995

3,323

2,185

（Category 2．Capital goods）

kilotons

105

284

305

203

（Category 3．Fuel and energy-related activities not included in Scopes 1 and 2）

kilotons

525

229

162

130

（Category 4．Upstream Transportation and Distribution）

kilotons

617

751

743

548

（Category 5．Waste generated from operations）

kilotons

2

25

22

17

（Category 6．Business travel）

kilotons

0

3

2

2

（Category 7．Employee commuting ）

kilotons

2

8

7

7

（Category 8．Upstream Leased Assets）

kilotons

N/A

N/A

N/A

N/A

（Category 9．Downstream Transportation and Distribution）

kilotons

126

183

176

64

（Category 10．Processing of sold products）

kilotons

215

449

522

402

（Category 11．Use of sold products）

kilotons

N/A

N/A

N/A

N/A

（Category 12．End-of-life treatment of sold products）

kilotons

107

5

8

5

（Category 13．Downstream leased assets）

kilotons

N/A

N/A

N/A

N/A

（Category 14．Franchises）

kilotons

N/A

N/A

N/A

N/A

（Category 15．Investments）

kilotons

N/A

6,038

5,465

5,410

★SOx

t

786

2,682

1,741

1,230

★NOx

t

10,756

867

700

632

★Soot and dust

t

142

165

107

39
  • The calculation method was partially changed in the fiscal year ended March 2024 to include GHG emissions from E-Scrap processing.

Waste

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 consolidated

2023.4-2024.3 consolidated

2024.4-2025.3 consolidated

★Total*

t

13,970

44,830

44,236

30,501

（Hazardous waste to be recycled）

t

1,733

2,926

2,508

1,448

（Non-hazardous waste to be recycled）

t

6,553

20,263

22,360

13,990

（Hazardous waste to be landfill）

t

207

4,449

4,508

4,393

（Non-hazardous waste to be landfill）

t

5,477

17,192

14,860

10,670
  • The data on the volume of industrial waste represent values reported in accordance with the Waste Management and Public Cleansing Act.

Chemical

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 consolidated

2023.4-2024.3 consolidated

2024.4-2025.3 consolidated

★Chemicals released*

t

78

182

309

276

（Atmosphere）

t

47

39

38

31

（Public waters）

t

31

93

141

115

（Soil）

t

0

0

0

0

（Landfills）

t

0

50

130

130

★Chemicals transferred*

t

42

186

157

163

（Sewers）

t

0

1

1

1

（Waste）

t

42

185

156

162
  • The data on chemicals released and transferred represent values reported under the Japanese Pollutant Release and Transfer Register (PRTR) system.

Spending on environmental preservation

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 Non-consolidated

2023.4-2024.3 Non-consolidated

2024.4-2025.3 Non-consolidated

Investment Amount

millions of yen

4,911

14,677

4,516

5,684

Business area costs

millions of yen

4,848

14,556

4,449

5,296

（Pollution prevention costs）

millions of yen

4,089

2,500

3,022

4,092

（Global environmental conservation costs）

millions of yen

641

11,808

1,130

874

（Resource recycling costs）

millions of yen

118

247

297

330

Upstream/downstream costs

millions of yen

0

13

26

280

Administration costs

millions of yen

46

68

6

30

R&D costs

millions of yen

2

35

21

72

Social activity costs

millions of yen

0

0

0

0

Environmental remediation costs

millions of yen

15

5

14

4

Expense Amount

millions of yen

7,282

17,567

20,188

26,727

Business area costs

millions of yen

6,821

15,743

17,416

21,602

（Pollution prevention costs）

millions of yen

3,426

10,101

10,916

15,904

（Global environmental conservation costs）

millions of yen

450

475

520

382

（Resource recycling costs）

millions of yen

2,946

5,167

5,980

5,315

Upstream/downstream costs

millions of yen

0

1

17

33

Administration costs

millions of yen

272

1,615

2,343

4,816

R&D costs

millions of yen

32

53

66

124

Social activity costs

millions of yen

13

13

16

14

Environmental remediation costs

millions of yen

144

142

330

139

Other

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 Non-consolidated

2023.4-2024.3 Non-consolidated

2024.4-2025.3 Non-consolidated

Number of environmental law violations

cases

0

0

0

0

Closed mines

Data items

Unit

2021.4-2022.3

2022.4-2023.3

2023.4-2024.3

2024.4-2025.3

Number of closed mines managed by Mitsubishi Materials Group

locations

21

21

20

20

Number of closed mines made publicly acccessible as cultural assets by Mitsubishi Materials Group

locations

4

4

4

4※
  • The tourism facility “Toi Gold Mine” operated by TOI MARINE KANKO Co.,Ltd. was transferred to PROSPER Japan Corporate Growth Support Fund No. 1 Investment Limited Partnership on July 31, 2025, following a business succession to Golden Park Toi Corporation.

Social

Boundary：

114 consolidated subsidiaries

Education performance data refers to the main companies subject to Compliance/Risk Management activities (80 companies)

Safety data relates to the 29 major consolidated subsidiaries

Social contribution activities results covering 88 consolidated subsidiaries

Period：

As of the end of March of each year, April to March of the following year or January to December of each year

FYE March 2025 data items with ★ are those for which assurance is provided.

Employment Status

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 Non-consolidated

2023.4-2024.3 Non-consolidated

2024.4-2025.3 Non-consolidated

Number of employees

persons

6,208

5,450

5,408

5,315

（Male）

persons

5,455

4,734

4,582

4,499

（Female）

persons

753

716

826

816

Percentage of female employees

％

12.1

13.1

15.3

15.4%

Percentage of employees holding rights of collective bargaining

％

74.6

73.7

74.0

73.8

Average duration of service

years

17.7

17.8

18.2

18.5

（Male）

years

18.2

18.4

18.7

18.9

（Female）

years

14.1

14.1

14.0

15.9

Average age (Union member)

years

42.0

42.2

42.6

43.2

★Percentage of employees with disabilities

％

2.3

2.3

2.5

2.9

★Percentage of women in management positions

％

2.5

2.5

3.2

3.9

Differences in pay between men and women*

％

ー

61.8

60.1

63.8

（Permanent workers ）

％

ー

65.3

62.8

66.3

（Part-time and fixed-term workers ）

％

ー

50.3

56.8

57.2
  • Calculations are based on the Act on Promotion of Women's Participation and Advancement in the Workplace. Although there is a difference in wages between men and women due to the difference in the ratio of management positions, there is no difference in the wage system or structure between men and women.
    In addition, the wage difference between men and women when compared among regular employees divided into management positions and union members is 86.5% for management positions and 83.8% for union members.

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 Non-consolidated

2023.4-2024.3 Non-consolidated

2024.4-2025.3 Non-consolidated

Total number of recruits

persons

326

243

288

248

（Male）

persons

268

199

224

182

（Female）

persons

58

44

64

66

（Total number of new graduates）

persons

218

167

171

124

（Male）

persons

174

131

125

87

（Female）

persons

44

36

46

37

（Total number of experienced persons）

persons

108

76

117

124

（Male）

persons

94

68

99

95

（Female）

persons

14

6

18

29

Number of employees taking maternity leave

persons

23

16

17

27

Number of employees taking caregiving leave

persons

5

2

4

0

（Male）

persons

3

0

2

0

（Female）

persons

2

2

2

0

★Number of employees taking childcare leave

persons

76

103

99

125

（Male）

persons

56

84

83

105

（Female）

persons

20

19

16

20

Percentage of employees who returned to work after childcare leave

％

100

100

100

100

Employee turnover*1,2

％

2.9

2.9

3.1

3.3

Percentage of employees who left the company for their own reasons

％

2.3

2.5

3.0

2.9

（Male）

％

2.2

2.5

2.8

2.9

（Female）

％

3.1

2.2

4.1

2.7

（By age：50 years and over）

％

1.3

1.0

1.4

1.1

（By age：30-49 years）

％

1.7

2.2

2.9

2.9

（By age：Under 30 years）

％

5.1

5.6

5.6

6.4

Engagement survey (percentage of positive responses to all questions).

％

―

71

73

75
  1. The number of regular employees who left the company / The number of regular employees at FYE March 2023.
  2. In April 2021, the existing mandatory retirement age was raised from 60 to 65 years old.

Data items

Unit

2021.4-2022.3 Consolidated

2022.4-2023.3 Consolidated

2023.4-2024.3 Consolidated

2024.4-2025.3 Consolidated

Number of employees

persons

23,711

18,576

18,323

18,452

（Male）

persons

－*1

14,373

14,198

14,219

（Female）

persons

－*1

4,203

4,125

4,233

Employee Numbers According to Location（Japan）

persons

13,290

11,436

11,373

11,151

Employee Numbers According to Location（North America）

persons

3,693

744

760

815

Employee Numbers According to Location（South America）

persons

42

47

60

56

Employee Numbers According to Location（Oceania）

persons

10

12

12

9

Employee Numbers According to Location（Europe）

persons

1,201

1,182

1,227

1,825

Employee Numbers According to Location（East Asia）

persons

772

754

687

743

Employee Numbers According to Location（Southeast Asia）

persons

4,703

4,401

4,204

3,853

Percentage of female employees

％

－*1

22.6

22.5

22.9%

Percentage of non-full-time employees*2

％

－*3

8.7

5.5

4.4
  1. Beginning with FYE March 2023, a breakdown of all employees (consolidated) by gender is disclosed.
  2. Calculated based on the input classification in the internal personnel data. Part-time and part-time employees are not included.
  3. Beginning with FYE March 2023, the percentage of non-permanent employees in the total number of employees (consolidated) is disclosed.

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 Non-consolidated

2023.4-2024.3 Non-consolidated

2024.4-2025.3 Non-consolidated

Average overtime hours (Union member)

hours

17.1

17.8

14

13.7

Percentage of paid leave taken (Union member)

％

81.1

87.3

83.9

86.6

Educational Achievements

Data items

Unit

Fiscal Year

Ended

March

2022

Fiscal Year

Ended

March

2023

Fiscal Year

Ended

March

2024

Fiscal Year

Ended

March

2025

Annual total hours of training (Aggregated, Consolidated)*

hours

－

198,567

260,891

271,665

Annual total hours of training (Aggregated, Non-consolidated)

hours

151,000

118,565

106,630

129,252

Number of Participants in Compliances Education and Position-specific education Program (Aggregated, Non-consolidated)

persons

19,400

21,214

49,547

66,768
  • Number of Group companies to which employees receiving education and training belonged: 70 in FYE March 2019, 67 in FYE March 2020, 62 in FYE March 2021, 53 in FYE March 2022, and 38 in FYE March 2023, 74 in FYE March 2024, 80 in FYE March 2025.
    From FYE March 2022, the number of participants in education and training includes non-regular employees as well as regular employees.

Community

Data items

Unit

2021.4-2022.3 Non-consolidated

2022.4-2023.3 Non-consolidated

2023.4-2024.3 Non-consolidated

2024.4-2025.3 Non-consolidated

Spending on social contribution

(excluding political donations)

millions of yen

443

405

221

392

Occupational Safety and Health

Data items

Unit

2021.1-2021.12

2022.1-2022.12

2023.1-2023.12

2024.1-2024.12

★Occupational accident frequency rate
（TRIFR：Non-consolidated）

％

1.68

2.30

2.88

1.66

★Occupational accident frequency rate
（TRIFR：Subcontractors）

％

6.12

2.62

2.70

3.69

★Occupational accident frequency rate
（LTIFR：Non-consolidated）

％

0.21

0.38

0.85

0.44

★Occupational accident frequency rate
（LTIFR：Subcontractors）

％

2.27

0.66

0.98

1.23

Number of occupational accidents（Non-consolidated）*

cases

24

30

34

19

★Number of fatalities due to occupational accidents

persons

0

0

0

0
  • Occupational accidents frequency rate and incident rate do not include accidents during commuting or minor injuries.

Governance

Boundary：97 consolidated subsidiaries

Period：April to March in each year

Governance

Data items

Unit

July 1, 2021

July 1, 2022

July 1, 2023

July 1, 2024

Number of Directors in Mitsubishi Materials Corporation*

Total

persons

10

10

11

11

Male

persons

4

3

4

9

Female

persons

0

0

0

2

Outside Directors

persons

6

7

7

7

Male

persons

5

5

5

5

Female

persons

1

2

2

2

Female Directors

persons

1

2

2

2

Percentage of female Directors

％

10

20

18.2

18.2

Remuneration for Directors (total)

millions of yen

701

959

703

671

（Directors in Mitsubishi Materials Corporation）

millions of yen

124

97

88

88

（Outside Directors）

millions of yen

111

122

126

130

（Executive Officer）

millions of yen

466

740

489

452
  • As of the close of the General Meeting of Shareholders for the year in question.

Donations to political groups

Data items

Unit

2021.4-2022.3 Non-consolidated

2021.4-2023.3 Non-consolidated

2023.4-2024.3 Non-consolidated

2024.4-2025.3 Non-consolidated

Amount of donations to political groups

thousands of yen

571

340

280

210

Compliance

Data items

Unit

2021.4-2022.3 Consolidated

2022.4-2023.3 Consolidated

2023.4-2024.3 Consolidated

2024.4-2025.3 Consolidated

Number of reports and inquiries received through the in-house reporting system

cases

47

65

63

67

（Number of reports on compliance）

cases

－*

28

38

34

（Number of reports on corruption）

cases

－*

0

0

0

（Number of violations related to corruption）

cases

－*

0

0

0

（Number of harassment reports）

cases

－*

16

29

19

（Number of harassment certifications）

cases

－*

4

1

1
  • Starting from FYE March 2022, the Company discloses a breakdown of the number of consultations with the in-house reporting system.

Tax

Unit

Fiscal Year

Ended

March

2022

Fiscal Year

Ended

March

2023

Fiscal Year

Ended

March

2024

Fiscal Year

Ended

March

2025

Amount of Tax Payment

millions of yen

16,350

18,995

11,564

8,189

（Japan）

millions of yen

7,345

10,847

2,414

1,862

（United States）

millions of yen

793

986

940

631

（Europe）

millions of yen

5,735

2,433

3,857

2,982

（Asia）

millions of yen

2,090

4,729

4,345

2,684

（Other areas）

millions of yen

387

0

8

30

（Related party transactions eliminated）

millions of yen

0

0

0

0