With an already fraught Sino-Japanese relationship, Japan's conservative Liberal Democratic Party's return to power commands concern.
Shinzo Abe, leader of Japan's main opposition LDP, said that relations between Japan and China is one of the most important bilateral ties for Japan.
The LDP of Japan won the election, but tension with China will continue if party chief Shinzo Abe follows his hawkish campaign rhetoric, experts said.
Noda quits from DPJ's presidencyLDP, Komeito agree to form coalition Special: Japan Election Comment: China to make good on neighbors
Chinese and Japanese aircraft were involved in a standoff in the skies above the Diaoyu Islands on Thursday. Special: Diaoyu Islands Dispute
Sino-Japanese relations have perhaps hit the lowest point this year, coinciding with the 75th Anniversary of the Nanjing Massacre that falls on Dec 13.
The US should appear as a cooperator, rather than an intruder, in its return to the Asia and Pacific.
China has expressed serious concern and firm opposition to a U.S. bill that regards China's territory as under the authority of a U.S.-Japan security pact.
As ties between China and Japan plunge to their lowest in decades, an amendment passed by the US Senate to make the Diaoyu Islands covered by a US-Japan security pact will boomerang.
Japanese automakers have started to see their sales in China rebound after Japan's illegal "purchase" of the Diaoyu Islands caused sales to decline sharply.
Special: Diaoyu Islands Dispute
Japan is urged not to do anything that will harm regional security and stability as right-wing forces rise in the country ahead of an election next month, a Foreign Ministry spokeswoman said on Friday.
Sovereignty protection 'proper and necessary': FM Special: Diaoyu Islands Dispute
A spokeswoman for China's Foreign Ministry on Thursday reiterated that the country has never accepted Japan's so-called existence on, or control of, the sea area adjacent to the Diaoyu Islands.
China vows to maintain territorial sovereignty
New Japanese ambassador to China named
The Japanese government officially approved the appointment of Masato Kitera as its new ambassador to China at a cabinet meeting Thursday morning.
Japanese exports to China fall amid islands row