Abstract
Research and collaboration among environmental researchers requires the integration of various databases. Using "Web mash-up" technology, we developed a browser to integrate five independent agro-environmental databases and facilitate integrated use. Mirrors of the databases are integrated through a Web Application Program Interface (Web API) in a virtual integrated database. Users can download various data sets derived from the five databases in the database. Our model will enhance the integrated use of diverse databases and so contribute to several fields of study. We discuss the technical details of the system, the architectonics of the API, and the technical problems we encountered.