Atomic power has emerged as a key issue ahead of Japan's election this Sunday. The country has faced political deadlock amid a slumping economy, territorial disputes and the fallout of its 2011 national disaster.
Japan will keep nuclear power as an important source of energy, according to the country's latest energy plan. The move comes despite widespread public unease over the technology following the 2011 Fukushima disaster.
The US is stepping up efforts to defend Japan against threats from North Korea and China. Several disputed islands in the South and East China Sea have the potential to threaten the stability of the entire region.
In light of an expanding China and economic challenges, Japan and the US "intend to overcome mutual differences and together forge a sturdy economic order for Asia and the Pacific in the 21st century" with Obama's visit.
President Barack Obama has arrived in Japan to begin his Asia tour. The White House has called the trip a "rebalancing" of US foreign policy in which Obama is expected reinforce his country's commitment to the region.
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