Japanese voters delivered a landslide victory to Prime Minister Shinzo Abe and the ruling coalition in an upper house election held on 10 July. While the outcome was never in doubt, the shift in the balance of power was decisive. The Liberal Democratic Party (LDP) won 56 of the 121 seats up for election, giving the party a total of 122 seats in the 242-seat upper house.
http://www.aspistrategist.org.au/japans-return-single-party-dominance/