2 The term "deposit of the citizen's voluntary society for tax saving" as used in this Law shall mean such deposit or saving in bank (excluding Bank of Japan), "mujin" company, credit cooperative association, agricultural cooperative association, fishery cooperative association, marine products processing cooperative association (hereinafter referred to as "designated financial institutions" ) as deposited through the citizen's voluntary society for tax saving by a member of the society concerned to save the fund for taxpayment.