立憲民政党
In 1929, Prime Minister Osachi Hamaguchi picked Tawara as Minister of Commerce and Industry. After his term expired in April 1931, he continued to play an important role in the Diet and in the general administration of the Rikken Minseitō. As with all other Japanese politicians, Tawara was forced to join the "Taisei Yokusankai" created by Prime Minister Fumimaro Konoe in 1940. However, Tawara was defeated in the 1942 General Election and retired from public life. He died in 1944 at the age of 77.