In 2012, the Democratic Party government under Yoshihiko Noda decided to implement a raise of the Japanese consumption tax. Following this move, the Liberal Democratic Party under Shinzo Abe regained control of the Japanese government in the December 2012 general election. Abe proceeded to implement a series of economic programs known as "Abenomics" in a bid to stimulate the economy. Despite these programs, Japan entered a technical recession in mid-2014, which Abe blamed on the consumption tax hike, even though many members of the LDP supported the hike. Abe called a snap election on November 18, in part for the purpose of winning LDP backing to postpone the hike and pursue the Abenomics package. The LDP government was widely expected to win the election in a landslide, and many observers viewed the snap election as a mechanism for Abe to entrench his government at a time of relative popularity.
The most high-profile LDP candidate to lose re-election is Agriculture MinisterKoya Nishikawa, who lost by 199 votes to former Governor of Tochigi Akio Fukuda. He was questioned in October after allegedly receiving financial support from a fraudulent company. Amongst the DPJ members to lose their seats were party leader Banri Kaieda. Party for Future Generations leader Shintaro Ishihara was also unsuccessful in his attempt to win a seat after receiving a low position on his party's representative ballot. Former leader of the now-dissolved Your Party and six-term representative for Tochigi-3rd district Yoshimi Watanabe was also defeated. The JCP gained its first single-seat constituency seat since the 1996 election. Amidst a growing anti-base movement in Okinawa, JCP candidate Seiken Akamine unseated LDP incumbent Kōnosuke Kokuba in a night marked with a nationwide JCP surge.
Other elections
Generally, the retention referendum to confirm judges of the Supreme Court who have been recently appointed or not confirmed for 10 years is held together with a lower house election. Subnational elections scheduled for December 14 include the prefectural assembly election in Ibaraki. Another prefectural election in December 2014 is the gubernatorial election in Miyazaki, scheduled for December 21.
Boundary changes
Under 2013 changes to the electoral law designed to reduce malapportionment, district boundaries in 17 prefectures have been redrawn and five districts are eliminated without replacement. The number of first-past-the-post seats is reduced to 295, the total number of seats decreases to 475.
Constitutionality
In November 2015, the Grand Bench of the Supreme Court ruled that the inequality in vote weight due to malapportionment was still in an unconstitutional state ; however, as in previous such rulings, it dismissed the demand to invalidate the election.
Polling
;Parties' approval ratings from 2013–14 ;Cabinet approval/disapproval ratings