The increasing of natural hazards in Eastern Part of Indonesia (EPI) triggered the needs for a comprehensive understanding of the natural hazard itself along with the substantial causes. The best way for achieve a comprehensive understanding of it is by building and implementing an environmental simulator. Faculty of Engineering of Hasanuddin University (FoE-UNHAS) with the fund from JBIC Loan that based on the Enhancement Project of FoE-UNHAS, respond to this need by establishing the Regional Environmental Simulator at FoE-UNHAS new campus in Gowa, South Sulawesi Province, Indonesia.

This is the report of the training done by the author in Graduate School for IDEC, Hiroshima University during the 2013 Japan Short Term Visit, from June 24th to September 21st 2013. The training was focusing on the Meteorological Simulation using numerical code of Weather Research and Forecasting (WRF) and the Estuary Circulation using ECOMSED.

Special thanks goes to the JICA-Japan and PIU-GOWA Project UNHAS for the fund and all of their assistance to the author.