Common function Standard

In cooperation with the ministries and agencies in charge of systems, we are creating standard specifications for common function for mission-critical systems.

What's New

• March 6, 2026
  • Specification Frequently Asked Questions Reference Material's "function Common Standard Specifications for Local Public Entity Information Systems and Standard Specifications for Data Requirements and Linkage Requirements"
• February 27, 2026
  • Links to the latest version of the specification in the latest version of the specifications.
• January 27, 2026
  • Specification Frequently Asked Questions Reference Material's "function Common Standard Specifications for Local Public Entity Information Systems and Standard Specifications for Data Requirements and Linkage Requirements"
• October 31, 2025
  • Specification Frequently Asked Questions Reference Material's "Common function Standard Specifications for Local Government Information Systems"

Links to Resources

• Links to the latest version of the specification
  • Specification Frequently Asked Questions Reference Material
• Download Specifications
  • Common function Standard Specifications for Local Government Information Systems
  • Attachment
    • Bulk download by release date
    • Data for each separate sheet

Links to the latest version of the specification

*For the publication history of specifications, please check the List of Published Common function Standard Specifications for Local Government Information Systems in (Excel / 20 kb) (updated on February 27, 2026).

Updated February 27, 2026

Specification Frequently Asked Questions Reference Material

• FAQ on "Common function Standard Specifications for Local Government Information Systems" (updated on October 31, 2025) PDF (669 kb) / Comparative table of the current and amended provisions, Excel (68 kb)
• Reference (Recommended Guidelines) on "function Common Standard Specifications for Local Public Entity Information Systems and Standard Specifications for Data Requirements and Linkage Requirements" (updated on March 6, 2026) PDF (1,907 kb) / Comparative table of the current and amended provisions, revised version (PDF / 1,907 kb)
  • Attachment 1 _ Work Flow for Application Management function (Excel / 149 kb)
  • Attachment 2 _ Sample Code (ZIP / 2 kb)
  • Attachment 3 _ Detailed Reference on Data Requirement and Linkage Requirement (ZIP / 3,542 kb) (updated on March 6, 2026)
    • *The following two operations were updated and published based on suggestions from the PMO tool.
      • 019 _ Health Administration (updated 3 / 6 / 2026)
        • 019o018
      • 027 _ Child Benefit (released on March 6, 2026)
        • 027001
• List of Main Items to be Checked for Inter-Business Coordination
  • Using the Key Checklist (PDF / 394 kb)
  • Key Checklist (Excel / 61 kb)
• Sharing of precedents for inter-provider coordination
  • Prior Examples of Inter-Company Coordination (PDF / 471 kb) (updated on April 30, 2025)
• Reference (Recommended Practices) Guide for Local Government Information Systems Certification function and File Federation function (ZIP / 25,740 kb)
  *To learn more about the reference implementation, have a GCAS account and refer to the documentation available on the GCAS Guide (member only page).
  • FAQ on "Reference (Recommended Guidelines) Guide for Local Public Entity Information Systems Certification function and File Linkage function" (updated on January 31, 2025) PDF (452 KB) / Comparative table of the current and amended provisions, Excel (62 KB)

Download Specifications

Common function Standard Specifications for Local Government Information Systems

Attachment

Bulk download by release date

• Attachment: Published on February 27, 2026 (ZIP / 2,729 kb)
• Attachment: September 30, 2025 (ZIP / 2,687 kb)
• Exhibit 4 / 30 / 2025 (ZIP / 1,991 kb)
• Attachment: Published on February 28, 2025 (ZIP / 849 kb)
• Attachment: September 30, 2024 (ZIP / 3,320 kb)
• Exhibit 4 / 30 / 2024 (ZIP / 1,201 kb)
• Attachment: Published on February 14, 2024 (ZIP / 2,520 kb)
• Attachment: Published on September 29, 2023 (ZIP / 2,248 kb) (updated on November 24, 2023)
• Attachment: Published on March 30, 2023 (ZIP / 2,612 kb) (April 11, 2023, updated on June 30, 2023)
• Attachment: Published on August 31, 2022 (ZIP / 1,247 kb)

Data for each separate sheet

Function requirements

Application Management _ Item Definition Document

Item Definition Document for Management of Non-Resident Address Numbers

Integration within the organization Address _ Item Definition Form

Integrated Storage Management _ Item Definition Document

Integrated Delinquency Management _ Item Definition Statement

Alien Address Basic Information Inquiry API Specification

*We integrated the API specification for the extraction of non-resident candidates [Version 1.0] and the API specification for the update of non-resident address basic information [Version 1.0] to formulate the API specification for the inquiry of non-resident address basic information [Version 2.0].

Non-Resident Address Numbering API Specification

Detailed technical specifications for file association

OAuth2.0 Access Token Issuance API Specification

OAuth2.0 Access Token Information Retrieval API Specification

OAuth2.0 Access Token Revocation API Specification

Specification of abolishment, etc.