Japanese Prime Minister Shinzo Abe's ruling coalition won a comfortable majority in the upper house of parliament.
As part of its campaign to stem China's "aggressive and assertive" territorial expansion in the region, Japan recently announced billions of dollars in assistance to five countries in Southeast Asia.
The Japanese government has sought to allay public fears after more than one million names and pension numbers were leaked by cyberattackers. A similar scandal almost led to PM Abe's downfall in 2007.
A former bureaucrat and media commentator has accused PM Abe's administration of using threats and incentives to ensure the Japanese public does not get the whole picture. And he fears a dictatorship is a possibility.
As fears grow that PM Shinzo Abe' conservative government is whitewashing the nation's past aggressions, scholars say the 70th anniversary of the end of World War II is an occasion for Japan to address historic issues.