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ESG Performance Data

Society

＊ We intend to obtain third-party assurance for the FY2025 data. Accordingly, certain figures may be revised during the assurance process.

Employees

	Scope	2022	2023	2024	2025
Number of employees	Mitsui Chemicals Group	18,933	19,861	17,320	16,967
Number of employees	Mitsui Chemicals, Inc.^*1	7,073	7,265	7,358	7,227

Region

	Scope		2022	2023	2024	2025
Ratio of region / %	Mitsui Chemicals Group	Japan	60	60	64	64.3
		China	5	4	5	4.2
		Asia	11	12	13	13.4
		Europe	16	16	9	8.6
		North, Central, and South America	8	8	9	9.4
		Others	0	0	0	0

Gender

	Scope			2022	2023	2024	2025
Male-female ratio / %	Mitsui Chemicals Group^*2		Male	82	79	79	78
	Mitsui Chemicals Group^*2		Female	18	21	21	22
	Mitsui Chemicals, Inc.^*1		Male	86	86	85	84
	Mitsui Chemicals, Inc.^*1		Female	14	14	15	16
Male-female ratio in all Manager-level or above / %	Mitsui Chemicals Group^*2		Male	89	88	86	86
Male-female ratio in all Manager-level or above / %			Female	11	12	14	14
Male-female ratio in Manager-level / %			Male	88	88	85	84
Male-female ratio in Manager-level / %			Female	12	12	15	16
Male-female ratio in Manager of Manager-level / %			Male	94	92	90	90
Male-female ratio in Manager of Manager-level / %			Female	6	8	10	10
Male-female ratio in manager-level or above in revenue-generating functions / %			Male	89	87	85	88
			Female	11	13	15	12
Male-female ratio in STEM positions / %			Male	87	87	85	85
Male-female ratio in STEM positions / %			Female	13	13	15	15
Male-female ratio in management staff (supervisor-level) / %	Mitsui Chemicals, Inc.^*1	Full-time employees	Male	86	85	83	82
		Full-time employees	Female	14	15	17	18
Male-female ratio in management staff (manager-level or above) / %		Full-time employees	Male	95	94	92	92
		Full-time employees	Female	5	6	8	8
		All employees^*3	Male	95	94	92	93
		All employees^*3	Female	6	6	8	7
Male-female ratio in management staff (general manager-level or above) / %		Full-time employees	Male	98	96	95	95
		Full-time employees	Female	2	4	5	5
Number of new management staff (manager-level or above) / %		Full-time employees	Male	87	90	86	87
Number of new management staff (manager-level or above) / %		Full-time employees	Female	13	10	14	13

* Based on the number of employees as of the end of March

Age

	Scope		2022	2023	2024	2025
Average age / age	Mitsui Chemicals, Inc.^*1	Male	41.5	41.3	41.4	41.2
		Female	43.4	42.7	41.9	41.4
		Total	41.8	41.5	41.4	41.2
Composition ratio by age / %	Mitsui Chemicals Group^*2	10s (Ages 18 or older)	0.9	0.8	0.7	0.6
		20s	17.1	17.0	17.4	16.8
		30s	24.7	24.5	25.5	25.4
		40s	24.7	24.3	23.7	23.8
		Over 50s	32.6	33.4	32.7	33.4
	Mitsui Chemicals, Inc.^*1	10s (Ages 18 or older)	1.8	1.6	1.6	1.2
		20s	19.8	20.5	20.8	21.9
		30s	19.7	20.8	21.8	22.8
		40s	22.4	20.6	19.5	18.9
		Over 50s	36.3	36.5	36.3	35.2

Nationality

	Scope		2022	2023	2024	2025
Composition ratio by nationality / %	Mitsui Chemicals Group^*2	Japan	70.3	65.6	61.4	62.1
		Germany	4.9	7.8	8.0	7.1
		USA	4.1	4.2	4.7	4.6
		China	3.9	4.2	3.9	4.0
		Thailand	3.8	3.3	4.6	4.4
		Mexico	1.6	1.8	2.0	1.7
		Romania	2.1	2.8	2.7	2.5
		Other	9.4	10.4	12.6	12.1

Disabilities

	Scope	2022	2023	2024	2025
Ratio of employees with disabilities / %	Mitsui Chemicals, Inc.^*1	2.5	2.5	2.5	2.5

Labor Union Members

	Scope	2022	2023	2024	2025
Ratio of labor union members / %	Mitsui Chemicals, Inc.^*1	54.0	54.2	54.9	55.6

Employee-friendly Working Environment

Service and Turnover

	Scope		2022	2023	2024	2025
Average length of service / years	Mitsui Chemicals, Inc.^*1	Male	18.0	17.5	17.6	16.6
		Female	19.1	18.0	16.9	15.4
		Total	18.1	17.5	17.5	16.4
Employee turnover rate / %	Mitsui Chemicals, Inc.^*1	Male	5.41	4.46	5.16	6.07
		Female	3.46	4.09	5.81	3.69
		Total	5.15	4.40	5.26	5.70
Total number of employee turnover	Mitsui Chemicals, Inc.^*1	Male	335	281	330	387
		Female	33	42	64	43
		Total	368	323	394	430
Voluntary turnover rate / %	Mitsui Chemicals, Inc.^*1	Male	1.41	1.90	1.85	2.18
		Female	1.36	1.85	1.81	1.63
		Total	1.40	1.90	1.84	2.10
Number of voluntary turnover	Mitsui Chemicals, Inc.^*1	Male	87	120	118	139
		Female	13	19	20	19
		Total	100	139	138	158
Ratio of re-employment for retired employees / %	Mitsui Chemicals, Inc.^*1		89.8	86.2	79.9	60.0

Overtime

	Scope		2022	2023	2024	2025
Number of employees whose overtime hours exceeded 80 hours / month	Mitsui Chemicals, Inc.^*1	Non-management staff	12	14	15	17
		Management staff	34	54	49	48
		Total	46 (0.7%)	68 (0.9%)	64 (0.9%)	65 (0.9%)
Average overtime hours / hours/month^-1	Mitsui Chemicals, Inc.^*1		21.7	20.2	20.0	20.3
Average overtime hours (statutory) / hours・month^-1	Mitsui Chemicals, Inc.^*1		1.7	1.3	0.2	0.7

Paid Leave

	Scope		2022	2023	2024	2025
Paid leave usage rate / %	Mitsui Chemicals, Inc.^*1	Non-management staff	88	87	86	87
		Management staff	64	68	68	70
		Total	77	79	78	80
Average number of days used for paid leave	Mitsui Chemicals, Inc.^*1	Total	15.3	15.5	15.5	16

Childcare

	Scope		2022	2023	2024	2025
Number of employees taking childcare leave	Mitsui Chemicals, Inc.^*1	Male	141	199	182	249
		Female	27	24	25	40
		Total	168	223	207	289
Childcare leave usage rate / %	Mitsui Chemicals, Inc.^*1	Male	84	90	90	97
		Female	100	100	100	100
		Total	86	91	91	98
Average number of days used for childcare leave	Mitsui Chemicals, Inc.^*1	Male	27	31	43	47
Return rate of employees from childcare leave / %	Mitsui Chemicals, Inc.^*1	Male	100	100	100	100
		Female	100	100	100	100
		Total	100	100	100	100
Employee retention rate three years after childcare leave / %	Mitsui Chemicals, Inc.^*1	Male	97	99	95	92
		Female	82	100	89	86
		Total	95	99	95	92
Number of employees using Part-time working option for childcare	Mitsui Chemicals, Inc.^*1	Male	11	4	4	3
		Female	70	54	54	59
		Total	81	58	58	62

Family Care

	Scope	2022	2023	2024	2025
Number of employees taking paid family care leave	Mitsui Chemicals, Inc.^*1	3	2	1	1
Number of employees using Part-time working option for family care	Mitsui Chemicals, Inc.^*1	1	1	1	1

Recruitment

	Scope		2022	2023	2024	2025
Total number of employees hired	Mitsui Chemicals, Inc.^*1	Male	367	395	292	204
		Female	92 (20%)	95 (19%)	117 (29%)	85 (29%)
		Regular recruitment	244	258	260	224
		Mid-career recruitment	215	232	149	65
		Total	459	490	409	289

Number of Employees Hired through the Regular Recruitment

	Scope		2022	2023	2024	2025
Career-track administrative positions	Mitsui Chemicals, Inc.^*1	Male	12	12	9	11
		Female	13 (52%)	7 (37%)	14 (61%)	11 (50%)
		Total	25	19	23	22
Career-track technical positions	Mitsui Chemicals, Inc.^*1	Male	61	75	69	64
		Female	16 (21%)	22 (23%)	34 (33%)	33 (34%)
		Total	77	97	103	97
General positions	Mitsui Chemicals, Inc.^*1	Male	129	123	116	85
		Female	13 (9%)	19 (13%)	18 (13%)	20 (19%)
		Total	142	142	134	105

* Based on the number of employees hired through the regular recruitment as of April 1

Number of Employees Hired through the Mid-career Recruitment

	Scope		2022	2023	2024	2025
Career-track administrative positions	Mitsui Chemicals, Inc.^*1	Male	74	98	54	27
		Female	24 (25%)	27 (22%)	30 (36%)	11 (29%)
		Total	98	125	84	38
Career-track technical positions	Mitsui Chemicals, Inc.^*1	Male	50	46	10	9
		Female	8 (14%)	2 (4%)	3 (23%)	2 (18%)
		Total	58	48	13	11
General positions	Mitsui Chemicals, Inc.^*1	Male	41	41	34	8
		Female	18 (31%)	18 (31%)	18 (35%)	8 (50%)
		Total	59	59	52	16

Human Resources Development

	Scope	2022	2023	2024	2025
Training hours per person / hours	Mitsui Chemicals Group	20.3	18.5	19.6	11.7
Training cost per person / thousand yen	Mitsui Chemicals Group	67.3	73.3	75.8	127.4
Training hours per person / hours	Mitsui Chemicals, Inc.^*1	31.6	35.0	43.0	31.0
Training cost per person / thousand yen	Mitsui Chemicals, Inc.^*1	164.3	172.0	174.3	169.0

Percentage of Positions Filled Internally (Management Position)

	Scope	2022	2023	2024	2025
Percentage of positions filled internally / % (Number of positions filled by existing employees / Total Number of filled positions)	Mitsui Chemicals, Inc.^*1	89.2	79.6	78.9	93.8

Successor Coverage Rate

	Scope	2022	2023	2024	2025
Successor Coverage Rate / % (The number of successor candidates for strategically critical positions / The number of strategically critical positions.)	Mitsui Chemicals Group	211	220	235	226

Compensation

	Scope			2022	2023	2024	2025
The gender pay gap/ % (Percentage of women's pay to man's pay.)	Mitsui Chemicals, Inc.^*1	All employees		82.9	84.0	86.7	84.8
		Full-time employees	All Full-time employees	83.0	84.9	87.6	85.3
			Management staff	92.0	92.0	93.4	94.6
			Non-Management staff	92.8	95.5	94.8	92.9
		Part-time and Fixed-term employees	All Part-time and Fixed-term employees	68.8	70.3	72.8	68.3
			Management staff	61.0	73.4	66.1	79.0
			Non-Management staff	90.5	93.1	107.3	94.3
The gender pay gap / % (Percentage of women's base salary to man's base salary.)		Full-time employees	Management staff	─	93.0	96.2	94.9
		Full-time employees	Non-Management staff	─	102.4	103.0	100.4

Employee Engagement

	Scope	2022	2023	2024	2025
Engagement score / %	Mitsui Chemicals Group	─	36	36	38

Human Capital - Return On Investment

	Scope	2022	2023	2024	2025
Human capital ROI / %	Mitsui Chemicals Group	70.4	37.9	39.7	36.5

Safety and Prevention

Accidents/Cases

	Scope	2022	2023	2024	2025
Number of major accidents / cases	Mitsui Chemicals Group	0	0	0	1
Number of abnormal conditions / accidents / cases	Mitsui Chemicals, Inc.	8	12	26	19
	Domestic subsidaries and affiliates	0	3	5	3
	Overseas subsidaries and affiliates	0	1	0	1
	Mitsui Chemicals Group	8	16	31	23

Work Related Injuery

	Scope	2022	2023	2024	2025
Number of Work-related fatalities	Groups' employees	0	0	1^*7	1^*8
Number of Work-related fatalities	contractor's employees^*5	0	0	0	0
Serious Occupational Injuries (Deaths or disabilities that are Class 7 or higher)	Mitsui Chemicals Group^*6	0	0	3^79*10	1^*8
Lost-Time Injury Frequency Rate (LTIFR)	Mitsui Chemicals Group^*6	0.29	0.33	0.28	0.23
Work-related Significant occupational injury^*11 frequency	Mitsui Chemicals, Inc.^*6	0.25	0.05	0.10	0.10
	Domestic subsidaries and affiliates^*6	0.48	0.53	0.11	0.11
	Overseas subsidaries and affiliates^*6	0.11	0.41	0.20	0.40
	Construction subcontractors	0.23	0.33	1.03	0.33
	*Mitsui Chemicals Group^6**	0.27	0.28	0.30	0.21

Occupational Health

	Scope	2022	2023	2024	2025
Average rate of lifestyle-related disease (male) / %	Mitsui Chemicals, Inc.^*1	9.7	9.96	10.32	10.42
Frequency of absences from work due to health disorders	Mitsui Chemicals, Inc.^*1	0.83	0.95	0.87	1.09
Frequency of absences from work due to mental health disorders	Mitsui Chemicals, Inc.^*1	0.55	0.69	0.65	0.87
Ratio of smokers / %	Mitsui Chemicals, Inc.^*1	19.9	19.1	18.8	18.2
Harmful substance risk assessment implementation rate / %	Mitsui Chemicals, Inc.	100	100	100	100

Product Stewardship

	Scope	2022	2023	2024	2025
Product risk assessment implementation rate / %	Mitsui Chemicals, Inc.	100	100	100	100
Number of major legal and regulatory violations	Mitsui Chemicals, Inc.	0	0	0	0

Quality of Products and Services

	Scope	2022	2023	2024	2025
Number of major quality-related legal and regulatory violations	Mitsui Chemicals Group	0	2	0	0
Incidence of PL accidents & serious product quality incidents	Mitsui Chemicals Group	0	0	0	0

Logistics

	Scope	2022	2023	2024	2025
Number of serious occupational injuries in logistics	Mitsui Chemicals Group	0	0	0	0
Number of major accidents in logistics	Mitsui Chemicals Group	0	0	0	0
Number of quality issues/ppm	Mitsui Chemicals Group	58	43	14	27

Sustainable Procurement

	Scope	2022	2023	2024	2025
Sustainable procurement ratio / %	Mitsui Chemicals, Inc.	61	61	61	67

Social Activities

		Scope	2022	2023	2024	2025
Social contribution expenditure / million yen		Mitsui Chemicals Group	417	219	267	234
	cash donations / million yen	Mitsui Chemicals Group	372	138	92	73
Number of employees taking community service leave		Mitsui Chemicals, Inc.^*1	67	83	112	118

Visualization of Contributions to the Society

	Scope	2022	2023	2024	2025
Rose Value™ products sales ratio / %	Mitsui Chemicals Group	21	24	25	27

*1 Mitsui Chemicals, Inc.'s employyee

*2 The data collected from affiliated companies that have implemented the Workday system.

*3 Includes reemployment, contract employees, etc.

*4 Revised due to identified errors or a review of the calculation method.

*5 Includes contractors operating on site and construction subcontractors.

*6 Includes contractors operating on site.

*7 Fatal occupational accident during an overseas business trip in December 2023 (recognized as an occupational accident in September 2024)

*8 Fatal occupational accident during an overseas business trip in July 2024 (recognized as an occupational accident in December 2025)

*9 Fall from height during scaffold dismantling work in September 2024 (certified as Grade 5 disability in April 2026)

*10 Right ankle caught while removing a crane sling in December 2024 (certified as Grade 6 disability in June 2025)

*11 “Work-related Significant Occupational Injuries (WSOIs)” refer to occupational injuries that resulted in absence from work or death. WSOIs also include lighter occupational injuries that may lead to absence from work or death due to the potential danger in the cause of the injury. WSOIs do not include injuries that are not directly related to operations.