This paper reports an information retrieval system based on Z39.50 protocolfor Japanese bibliographic data. The system consists of a client which can access to any other Z39.50 servers, and of a server which provides Japan/ MARC data to any other clients. The server facilitates AND/OR operation between results-sets as well as basic retrieval such as AND, OR, and NOT. The client has a connection window which displays about 200 servers, and a retrieval one which displays number of results and data of ones.