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Changes in Officers155AInformation Strategy and Technology Co.,Ltd.Information and Communications, Services and Others

Subsidiary WhiteBox names Ishiyama Masayuki (石山正之) as new representative director

At wholly owned subsidiary WhiteBox, Ishiyama Masayuki (石山 正之) changed from director to representative director. The appointment took effect on 18 September 2026, changing the subsidiary's top executive.

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Improvement
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Who is moving to which position

Incoming appointee

1 item
Scheduled Appointment Date18 September 2026
Ishiyama Masayuki (石山正之)
Previous positionDirector, WhiteBox Co., Ltd.
New positionRepresentative Director
入社年 2025
Reason for change

To vigorously drive further strengthening of the business foundation, enhancement of the value provided to customers and non-linear business expansion going forward

Who is moving to which position
ItemDetails
Scheduled Appointment Date18 September 2026
Name of appointeeIshiyama Masayuki (石山正之)
Appointee's new positionRepresentative Director
Appointee's previous positionDirector, WhiteBox Co., Ltd.
Year the appointee joined the Company2025
Reason for changeTo vigorously drive further strengthening of the business foundation, enhancement of the value provided to customers and non-linear business expansion going forward
Items this document does not state (15)
Resolution dateDate of departureAppointee's date of birthNumber of shares held by the appointeeName of departing officerFormer position of departing officerNew position of departing officerReason for departureWhether the incumbent will remain in officeReasons for appointmentNumber of directors after the changeFiling as an independent officerDetails of organizational changesChange 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.

To strengthen the business foundation, enhance the value provided to customers and expand the business by drawing on Ishiyama Masayuki's (石山 正之) track record in driving business growth and strengthening sales, as well as experience launching businesses at multiple companies and completing IPOs.

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Subsidiary WhiteBox names Ishiyama Masayuki (石山正之) as new representative director | Information Strategy and Technology Co.,Ltd. (155A) timely disclosure | Komori