Note : This document has been translated from the Japanese original for reference purposes only. In the event of any
discrepancy between this translated document and the Japanese original, the original shall prevail.

April 30, 2024
Company name
RepresentativeInquiries

RIKEN TECHNOS CORPORATION
Kazuaki Tokiwa, Representative Director,President & CEO(Securities Code: 4220, TSE Prime)
Junji Irie, Representative Director andSenior Managing Executive Officer, Senior
General Manager of Administrative Division(TEL: +81-3-5297-1650)

Notice of Changes in Directors
The Company hereby announces that the following changes in directors were decided on at the Board ofDirectors meeting held on April 30, 2024.
This matter will be officially decided on at the Company’s 95th Ordinary General Meeting of Shareholders to beheld on June 21, 2024, and at the subsequent Board of Directors and Audit and Supervisory Committee meetings.

1. Changes in Directors (as of June 21, 2024)(1) The candidates for Directors (excluding Directors serving as Audit & Supervisory Committee Members)
I. Reappointment

Name

New division of duties

Kazuaki Tokiwa

Representative Director, President & CEO

Junji IrieRepresentative Director, Senior Managing
Executive Officer

Senior General Manager,
Administrative Division

Director, Managing Executive Officer

Senior General Manager,
Sales & Marketing Division

Gakuyuki Kajiyama(2) The candidates for Directors serving as Audit & Supervisory Committee Members
I. New appointment

Name
Takashi Shimada

New division of duties
Director,
Full-time Audit & Supervisory Committee Member

II. Reappointment

Name

New division of duties

Shigeharu Nakamura

Outside Director,
Audit & Supervisory Committee Member (Independent Director)

Shigeru Ehara

Outside Director,
Audit & Supervisory Committee Member (Independent Director)

Aogi Suemura

Outside Director,
Audit & Supervisory Committee Member (Independent Director)* Mr. Shigeharu Nakamura, Mr. Shigeru Ehara, and Ms. Aogi Suemura have been registered as Independent
Directors as specified by the Tokyo Stock Exchange.

(3) Retiring Directors (excluding Directors serving as Audit & Supervisory Committee Members)

NameHitoshi Sugino

Division of duties
Director, Senior Executive Officer

Senior General Manager,
Technical Division* Mr. Hitoshi Sugino will retire from his post at the conclusion of the Ordinary General Meeting of Shareholders tobe held on June 21, 2024, when his term of office will expire, but will continue to serve as Senior Executive
Officer and Senior General Manager, Technical Division.

(4) Retiring Directors serving as Audit and Supervisory Committee members

Name
Masato Koizumi
Takayuki Hayakawa

Division of duties
Director,
Full-time Audit & Supervisory Committee Member
Outside Director,
Audit & Supervisory Committee Member (Independent Director)

2. Management Structure After June 21, 2024
(1) Directors (including those concurrently serving as executive officers)

Name

New division of duties

Kazuaki Tokiwa

Representative Director,
President & CEOJunji IrieRepresentative Director,
Senior Managing Executive Officer

Senior General Manager,
Administrative Division

Gakuyuki KajiyamaDirector,
Managing Executive Officer

Senior General Manager,
Sales & Marketing Division

Director,
Full-time Audit & Supervisory CommitteeMember
Outside Director,
Shigeharu Nakamura
Audit & Supervisory Committee Member(Independent Director)
Outside Director,
Shigeru Ehara
Audit & Supervisory Committee Member(Independent Director)
Outside Director,
Aogi Suemura
Audit & Supervisory Committee Member(Independent Director)* The Company’s Board of Directors consists of seven members (six men and one woman), three of whom
are Outside Directors.
Takashi Shimada(2) Executive Officers (excluding those concurrently serving as directors)
New division of duties
NameMichihisa Tasaka

Senior Executive Officer

General Manager of Start-up Office for New Business
Development

Hitoshi Sugino

Senior Executive Officer

Senior General Manager of Technical Division

Tomozo Ogawa

Senior Executive Officer

Senior General Manager of Manufacturing Division;
Senior General Manager of Procurement Division

Michio Noishiki

Senior Executive Officer

Senior General Manager of Corporate Planning DivisionToshimi Yamanaka

Executive Officer

Hisashi Onozuka

Executive Officer

Fumitoshi Nakamura

Executive Officer

Regional Officer of North America;
President, RIKEN AMERICAS CORPORATION;
President, RIKEN ELASTOMERS CORPORATION
Deputy Senior General Manager of Sales & Marketing Division;
General Manager of Film Business Unit;
General Manager of Sales & Marketing Strategy Department

Regional Officer of ASEAN
Deputy Senior General Manager of Sales & Marketing Division;

General Manager of Transportation Business Unit
Akihiro Tamura

Executive Officer

Senior General Manager of Quality Assurance Division

Hiroaki Wakayama

Executive Officer

Deputy Senior General Manager of Technical Division;
General Manager of R&D Center;
General Manager of Material R&D Dept. No.2, R&D Center[Attachment] Skills Matrix of the Board of Directors
In order to appropriately supervise the promotion of the four strategies set forth in the “Challenge Now for
Change New 2024,” a management policy under our three-year medium-term business plan, as well as themeasures supporting those strategies, we have identified the skills expected of the Board of Directors as followsand formulated a skills matrix.
< Relationship between management strategy and skill items >Strategies to Grow Strengths of Businesses
Four Strategies ofthe Three-year
Medium-term
Business PlanSkill Items

Strategy 1Intensify global
management andgenerate synergies

Strategy 2
Stay ahead ofcustomers’
expectations

Corporatemanagement/
Managementstrategy

Sales/
Marketing

Strategies for Future Growth
Strategy 3
Take on thechallenge toward
new businesses
and products

R&D/
Manufacturing

Strategy 4Contribute to solving
environmental andsocial issues

ESG/
Sustainability

Global experience

Measures that Support the Four Strategies(Capital investments in manufacturing
facilities, Intellectual property and R&D
investments, DX investments, Human
capital investments, and Reinforcement ofgovernance structures)

Finance/
Accounting

Legal/
Risk management

Personnel/Labor/
Human resource
development

DX/IT< Skill possession status (planned) >SkillsNamePosition

Representative

Corporatemanagement/
Sales/
Management Marketingstrategy〇〇

GlobalR&D/
Finance/
Legal/Risk
experience Manufacturing Accounting management〇Personnel/
Labor/ESG/
HumanSustainability
resource
development〇

DX/IT〇

KazuakiDirector, President &Tokiwa･Experience as a president of a U.S. subsidiary ･Work experience in sales, corporate planning, and quality assurance
CEOdivisions

Junji Irie

Representative〇〇〇〇〇〇
Director, Senior
Managing Executive ･Experience as an executive officer at a bank ･Experience as a senior general manager of the Company’sOfficer

administrative (personnel/accounting/legal/system)/corporate planning divisions

〇〇〇〇〇

〇

Gakuyuki Director, Managing
Kajiyama Executive Officer ･Experience as a president of a U.S. subsidiary ･Experience as a senior general manager of corporate planning
division ･Work experience in sales/R&D divisions
Director, Full-time〇〇〇

Outside Director,〇〇〇〇〇〇〇〇〇〇〇

Takashi
Audit & Supervisory
Shimada Committee Member ･Experience as a president of a U.S./domestic subsidiary ･Experience as a senior general manager ofmanufacturing/quality assurance divisions ･Work experience in R&D/personnel divisions
Shigeharu Audit & Supervisory
Nakamura Committee Member ･Experience as a vice president/executive officer at a bank ･Work experience in international/corporate(Head/Independent)
governance divisions
Outside Director,

Shigeru Audit & Supervisory
Ehara Committee Member(Independent)･Experience as a vice president/executive officer at a non-life insurance company ･Overseas work experience

Outside Director,〇Aogi
Audit & Supervisory
Suemura Committee Member(Independent)〇〇･Experience as a partner at an auditing firm ･Certified Public Accountant qualification

< Definitions of skills >Skill Items

Definitions

1

Corporate management/Management strategy

Experience as a director, executive officer, etc., at other companies (at a consolidated subsidiary,experience as a president)
Work experience at a corporate planning division, etc.

2

Sales/Marketing

Experience as a sales rep in the chemical industry, work experience in marketing division, etc.

3

Global experience

Overseas work experience, work experience in international division, etc.

4

R&D/Manufacturing

Work experience in R&D/manufacturing, or similar divisions

5Finance/Accounting

Work experience in accounting/finance divisions, or financial institutions, etc.
Knowledge of finance/accounting

6

Legal/Risk management

Work experience in legal/risk management, or similar divisions
Knowledge of legal/risk management

7

Personnel/Labor/
Human resource development

Work experience in personnel/labor/human resources development, or similar divisions
Knowledge of personnel/labor/human resources development

8

ESG/Sustainability

Work experience in ESG-related divisions
Knowledge of ESG/sustainability

9DX/ITWork experience in system development divisions, etc.
Knowledge of DX/IT