Former Liberal Democratic Party policy chief Koichi Hagiuda has voluntarily submitted to questioning by prosecutors investigating a political fundraising scandal involving the Japanese ruling party's largest faction, sources close to the matter said Tuesday.Four other senior members of the faction, including former Chief Cabinet Secretary Hirokazu Matsuno, have already been questioned amid allegations that the group failed to declare hundreds of millions of yen in revenue from fundraising parties in political funding reports and created slush funds for its members.Each of the five has told …READ FULL ARTICLE