OpenOcean is an Eectronical Health Record (EHR) system written in Java.
The origin of OpenOcean is OpenDolphin project which started in 2000 for the purpose of development open-source EHR system.
OpenDolphin became one of the major EHR software in Japan and created many derivatives of it.
OpenOcean is one of them.
<<more detail (sorry, japanese page only!)>>