Japanese Virtual Observatory (JVO): implementation of VO standard protocols

We developed the third prototype towards a Japanese Virtual Observatory (JVO). IVOA standards, such as Simple Image Access and ADQL, were adapted to the system for the first time. We also constructed an OAI-PMH publishing registry, a web service based searchable registry, and VO data services based on SIA and SkyNode protocols. Most of the components were built on open software, except for an XML database used for searchable registry. This paper describes the JVO proto 3 system and results of a performance measurement.