Provision of Patent Information Using API on a Trial Basis

The Japan Patent Office (JPO) has been providing patent information using an API since January 2022 to promote the utilization of patent information. This API (hereinafter referred to as the "Patent Information Retrieval APIs") enables the retrieval of certain application information related to: patents, designs, and trademarks (excluding utility model applications) provided through J-PlatPat; Patent Information standardized Data, and application information from the IP5 Offices (Japan Patent Office, United States Patent and Trademark Office, European Patent Office, China National Intellectual Property Administration, and Korean Intellectual Property Office) available through the One Portal Dossier (OPD).

To maintain stable operation, the provision of information via the Patent Information Retrieval APIs is regulated by access limits. This provision is currently in a trial phase aimed at assessing the utility of the Patent Information Retrieval APIs and understanding user needs. Therefore, user registration is required to facilitate smooth communication regarding stable operation and user needs assessment.

May 20, 2025

Policy Planning and Coordination Department,
Information Technology and Patent Information Management Office,

Using the Patent Information Retrieval APIs

(1) Compliance Matters

Upon agreeing to the Terms of Use, it is necessary to comply with the terms outlined in the Terms of Use and the Handbook.

• Terms of Use of the Patent Information Retrievals APIs (PDF: 104KB)
• Patent Information Retrieval APIs Handbook (Version 2.0) (PDF: 247KB)

The previous version of the Handbook can be checked here:

• Patent Information Retrieval APIs Handbook (Version 1.4) (PDF: 766KB)

(2) For Technical Specifications and Related Information, including Access Methods

Please refer to the API information Website.

• API Information Provision Site (link to external site)

User Registration Information

(1) API for Obtaining Patent, Design, and Trademark Application Information from the Japan Patent Office (Japan Patent Information Retrieval APIs)

Please fill out the required information in the application form and send it via email to the Policy Planning and Coordination Department, Information Technology and Patent Information Management Office, General Coordination Division (PA0630@jpo.go.jp). When sending the email, please title your email “Application for the use of Patent Information Retrieval APIs” in the subject line.

• Japan Patent Information Retrieval APIs Application Form (Word: 40KB)

(2) API for Obtaining Application Information from the One Portal Dossier (OPD-API)

New applications for user registration for OPD- API terminated as of August 9, 2024 in light of usage status of the API. Information will be notified on this web page upon additional recruitment as required.

Patent Information Retrieval APIs Support Center

The Patent Information Retrieval APIs Support Center will handle technical inquiries regarding the Patent Information Retrieval APIs. When making an inquiry, please include specific details about your situation (such as request and response content). Please note that we are unable to address questions related to user-created programs. Additionally, depending on the nature of your inquiry, it may take several days to receive a response.

Patent Information Retrieval APIs Support Center: contact@ip-data-support.jpo.go.jp

[Last updated 20 May 2025]