Now that PostgreSQL-j was installed, you should read the documentation and implementation guides. These can be found at: http://www.PostgreSQL.org/docs Documentations for the Multibyte-extention can be found at: doc/README.mb (English) doc/README.mb.jp (Japanese) You may wish to subscribe to the PostgreSQL user-support mailing list. Send an e-mail to pgsql-questions-request@postgresql.org with the text "subscribe" in the message body. If you understand Japanese, you might want to visit: http://www.sra.co.jp/people/t-ishii/PostgreSQL to subscribe a local mailing list for Japanese speakers. If you build PostgreSQL with TCL support, then you can use the TCL/TK based database frontend "pgaccess" for database operations.