Common Feature Standards

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

What's New

• October 31, 2025
  • Specification Frequently Asked Questions Reference Material's "Common Functional Standard Specifications for Local Government Information Systems"
• September 30, 2025
  • Links to the latest version of the specification in the latest version of the specifications.
  • Specification Frequently Asked Questions Reference Material's "Standard Specifications for Common Functions of Information Systems for Local Governments and Standard Specifications for Data Requirements and Linkage Requirements"
• June 10, 2025
  • Specification Frequently Asked Questions Reference Material.

Links to Resources

• Links to the latest version of the specification
  • Specification Frequently Asked Questions Reference Material
• Download Specifications
  • Common Functional 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 disclosure history of specifications, please check the List of Disclosure of Standard Specifications for Common Functions of Local Government Information Systems in (Excel / 21 kb) (updated on September 30, 2025).

Updated September 30, 2025

Specification Frequently Asked Questions Reference Material

• FAQ on "Standard Specifications for Common Functions of Information Systems for Local Governments" (updated on October 31, 2025) PDF (669 KB) / Comparative table of the current and amended provisions, Excel (68 KB)
• Reference (Recommended Practice) for "Standard Specifications for Common Functions of Information Systems of Local Governments and Standard Specifications for Data Requirements and Linkage Requirements" (updated on September 30, 2025) PDF (1,816 kb) / Comparative table of the current and amended provisions, Revised version (PDF / 1,817 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 / 4,419 kb) (updated on June 10, 2025)
    *Updated due to errors in some operations.
    • 024 _ National Health Insurance (updated on June 10, 2025)
      • 024o007
      • 024o008
      • 024o009
      • 024o026
    • 036 _ Consolidated Collections Management (Updated June 10, 2025)
      • 036o005
• 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 Guide to Local Government Information System Authentication and File Federation Features (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 to Authentication Functions for Local Government Information Systems and File Linkage Functions" (updated on January 31, 2025) PDF (452 KB) / Comparative table of the current and amended provisions, Excel (62 KB)

Download Specifications

Common Functional Standard Specifications for Local Government Information Systems

Attachment

Bulk download by release date

• 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

Functional 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.