Arsenic is a poison omnipresent inside the earth. Arsenic that comes to the surface through exploitation of nature such as agricultural irrigation withdrawing underground water, geothermal power plants or mining, has seriously contaminated the environment in Asia. The Asia Arsenic Network is a citizens’ association established in April 1994 by those doctors, teachers and journalists, among others, who supported the struggle of the Toroku and Matsuo arsenic victims. The Network aims to share experience and knowledge with the arsenic victims and experts in other Asian Countries to learn from each other and cooperate with a view to seeking ways to solve each problem.