It is an open data portal for the central administration.
Use open data in your own projects and operations.
DATASET
A dataset is a container in which "open data" such as files and URLs are registered.
Data Portal allows you to search for datasets from multiple angles.
search by category
Populaion and Households
Transport and Sightseeing
Social Security and Sanitation
Education,Culture,Sports and Life
Domestic Trade and Services
Business,Household,Economy
Administration and Public Finance
Information and Communication,Science and Technology
Agriculture,Forestry and Fisheries
Energy and Water
Land and Climate
International
Justice,Security and Environment
ORGANIZATION
You can find organizations that provide datasets.
You can search for datasets and communication content from an organizational perspective.
Cabinet Secretariat 
Cabinet Legislation Bureau 
National Personnel Authority 
Cabinet Office 
Imperial Household Agency 
Japan Fair Trade Commission 
Personal Information Protection Commission 
Financial Services Agency 
Consumer Affairs Agency 
Digital Agency 
Reconstruction Agency 
Ministry of Internal Affairs and Communications 
Ministry of Justice 
Ministry of Foreign Affairs of Japan 
Ministry of Finance 
Ministry of Education, Culture, Sports, Science and Technology 
Ministry of Health, Labour and Welfare 
Ministry of Agriculture, Forestry and Fisheries 
Ministry of Economy, Trade and Industry 
Ministry of Land, Infrastructure and Transport 
Ministry of the Environment 
Ministry of Defense 
National Police AgencySHOWCASE
A showcase is a group of multiple datasets.
You can search for datasets from showcases organized in various ways.
COMMUNICATION
You can refer to "evaluation", "opinions and requests", "use cases", "problem reports", etc. about datasets posted by other users.
Also, by logging in, you can post your own "evaluation", "opinions and requests", "use cases", "problem reports", etc.