Tokyo, Jan. 21 (Jiji Press)--Taro Yamamoto, leader of Japanese opposition party Reiwa Shinsengumi, announced on Wednesday his resignation from the House of Councillors, the upper chamber of the Diet, the country's parliament, due to health problems. "I'm one step away from multiple myeloma, a cancer of the blood. If I don't live by the main theme of not letting it progress, I could lose my ...