Komori
Changes in Officers6855JAPAN ELECTRONIC MATERIALS CORPORATIONElectrical Equipment and Precision Instruments

Notice Regarding Personnel Changes

Effective 25 June 2026, 龍 Ryu Keiichi (龍 圭一) was promoted from Director to Senior Managing Director and Senior Managing Executive Officer, with responsibility for Sales Operations and Product Technology. At the same time, the heads of Sales Operations and Product Technology changed, and 大久保 Okubo Kazumasa (大久保 和正)'s position changed from Honorary Chairman to Adviser.

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Who is moving to which position

Resolved 26 June 2026 (the decision is described as personnel changes effective 25 June 2026)

Incoming appointee

4 items
Scheduled Appointment Date25 June 2026
Ryu Keiichi (龍 圭一)
Previous positionDirector, Senior Executive Officer, General Manager of the Product Technology Division (responsible for Product Technology)
New positionSenior Managing Director, Senior Managing Executive Officer (responsible for Sales Operations and Product Technology)
辻 Tsuji Tomoyuki (辻 知之)
Previous positionDeputy General Manager, Sales Operations
New positionGeneral Manager, Sales Operations
中島 Nakajima Tomonao (中島 智尚)
Previous positionDeputy General Manager, Product Technology
New positionGeneral Manager, Product Technology
大久保 Okubo Kazumasa (大久保 和正)
Previous positionHonorary Chairman and Adviser
New positionAdviser

Departing officer

2 items
Date of departure25 June 2026
Ryu Keiichi (龍 圭一)Next role stated
Former PositionDirector, Senior Executive Officer, General Manager of the Product Technology Division (responsible for Product Technology)
New positionSenior Managing Director, Senior Managing Executive Officer (responsible for Sales Operations and Product Technology)
大久保 Okubo Kazumasa (大久保 和正)Next role stated
Former PositionHonorary Chairman and Adviser
New positionAdviser

“Next role stated” means the document names the position the person holds after stepping down. It does not necessarily mean they are leaving the company.

Whether the incumbent will remain in office (whether they will retain their position)

龍 Ryu Keiichi (龍 圭一) will remain a Director. 大久保 Okubo Kazumasa (大久保 和正)'s status as a Director is Not disclosed.

Details of organizational changes

The responsibilities and department-head structure for Sales Operations and Product Technology have changed. No consolidation, integration or establishment of new units is specified.

Who is moving to which position
ItemDetails
Resolution date26 June 2026 (the decision is described as personnel changes effective 25 June 2026)
Scheduled Appointment Date25 June 2026
Date of departure25 June 2026
Name of appointeeRyu Keiichi (龍 圭一), 辻 Tsuji Tomoyuki (辻 知之), 中島 Nakajima Tomonao (中島 智尚), 大久保 Okubo Kazumasa (大久保 和正)
Appointee's new positionSenior Managing Director, Senior Managing Executive Officer (responsible for Sales Operations and Product Technology), General Manager, Sales Operations, General Manager, Product Technology, Adviser
Appointee's previous positionDirector, Senior Executive Officer, General Manager of the Product Technology Division (responsible for Product Technology), Deputy General Manager, Sales Operations, Deputy General Manager, Product Technology, Honorary Chairman and Adviser
Name of departing officerRyu Keiichi (龍 圭一), 大久保 Okubo Kazumasa (大久保 和正)
Former position of departing officerDirector, Senior Executive Officer, General Manager of the Product Technology Division (responsible for Product Technology), Honorary Chairman and Adviser
New position of departing officerSenior Managing Director, Senior Managing Executive Officer (responsible for Sales Operations and Product Technology), Adviser
Whether the incumbent will remain in office龍 Ryu Keiichi (龍 圭一) will remain a Director. 大久保 Okubo Kazumasa (大久保 和正)'s status as a Director is Not disclosed.
Details of organizational changesThe responsibilities and department-head structure for Sales Operations and Product Technology have changed. No consolidation, integration or establishment of new units is specified.
Items this document does not state (10)
Appointee's date of birthYear the appointee joined the CompanyNumber of shares held by the appointeeReason for departureReason for changeReasons for appointmentNumber of directors after the changeFiling as an independent officerChange in Corporate Governance StructureSubject to Approval by the General Meeting of Shareholders

These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.

The reasons the company gives

The company's own explanation, not something inferred from the numbers.

The disclosure states only that the personnel changes were decided; no specific reasons for the changes are provided.

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Notice Regarding Personnel Changes | JAPAN ELECTRONIC MATERIALS CORPORATION (6855) timely disclosure | Komori