Overview
GakuNin RDM provides an API at the following link. These are notes on usage examples of this API.
Reference
GakuNin RDM is built on OSF (Open Science Framework), and API documentation can be found at the following link. It conforms to OpenAPI.
Obtaining a PAT
Obtain a PAT (Personal Access Token).
After logging in, you can create one from the following URL.
https://rdm.nii.ac.jp/settings/tokens/

Usage
You can also access it programmatically with the following script.
For reference, when the Authorization header was not specified, the following result was returned.
Checking in the Browser
API output results can also be checked in the browser.
As shown below, you can see that it was created with Django REST framework.

Also, it appears that “Django REST framework JSON:API” is used, with JSON:API adopted.
Summary
I hope this serves as a useful reference for the GakuNin RDM and OSF (Open Science Framework) APIs.