SECURITY POLICY
MESCIUS inc. (hereinafter referred to as “We” or “Our”) uses considerable amounts of information assets in the course of our business and in managing our employees, and thus recognizes that ensuring appropriate information security and striving to protect the information assets of our customers and stakeholders are essential requirements for promoting corporate activities based on social trust in addition to being important social responsibilities. Accordingly, in view of the importance of information security, we have established and will implement, maintain, and improve our “SECURITY POLICY.”
Compliance with Laws and Regulations
We comply with laws, regulations, norms, guidelines, and contractual obligations related to information security.
Protection of Information Assets
We identify threats, vulnerabilities, and risks, and implement countermeasures to maintain the confidentiality, integrity, and availability of all information assets in our possession.
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Confidentiality
Information assets are protected from unauthorized access, etc., and are not leaked to persons unauthorized to view them
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Integrity
Information assets are protected from alterations and errors, and are maintained accurately and completely
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Availability
Information assets are protected from loss, damage, and system disruption, etc., and are accessible when needed
Implementation of Education and Training
We provide all employees with the necessary information security education and training to ensure that they are thoroughly informed of the importance of information security and its appropriate handling and management.
Measures in the Event of an Accident
We are committed to preventing information security accidents, such as leakage, loss, damage, or unauthorized use of information assets, and in the unlikely event of an accident, we will minimize the damage, promptly disclose necessary information, and take appropriate measures, including measures to prevent recurrence.
Responding to Changes in the Environment
We will review and strive to continuously improve our information security management rules and structures in consideration of changes in the business environment, changes in the social environment and legal systems, the latest trends in information-related technology, and newly discovered risks.
Enactment date: April 1, 2022
Revision date: November 1, 2023 (company name change)
Final
revision date: July 1, 2024 (change of representative)
MESCIUS inc.
President: Yasuhiro Ono
ISO 27001 Certification
We have acquired the “Information Security Management System (ISMS)” certification, an internationally consistent third-party conformity assessment scheme for information security.

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Certification Number
JQA-IM1900
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Certification Standard
ISO/IEC27001:2013/JIS Q 27001:2014
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Certification Body
Japan Quality Assurance Organization
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Initial Certification Date
July 1, 2022
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Valid until:
June 30, 2025
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Scope of Registration
- Development, sales, and support of business app development support tools
- Development, sales, support, and servicing of system development support tools
- Development, sales, support, and servicing of systems for accounting, payroll, assets, tuition, personnel, and related services for incorporated educational institutions
ISMS Cloud Security Certification
We have acquired the “ISMS Cloud Security Certification,” an information security certification specialized for cloud services.

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Certification Number
JQA-IC0075
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Certification Standard
JIP-ISMS517-1.0
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Certification Body
Japan Quality Assurance Organization
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Initial Certification Date
July 1, 2022
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Valid until:
June 30, 2025
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Scope of Registration
- Business system services for incorporated educational institutions (LeySer System, LeySer web applications, LeySerKids)
- Business app functionality expansion services (krew, RayKit)