Takashi Inoguchi, 1945: Post-Second World War Japan, in Benjamin Isakhan e Stephen Stockwell (a cura di), The Edinburgh Companion to the History of Democracy, Edinburgh University Press, 2012, p. 308, ISBN 978-0-7486-4075-1.
«The Democratic Party of Japan is a centre-left party, but it contains a sizeable union-based left wing and some members close to the extreme right.»
