After Japanese Prime Minister Naoto Kan's apology to the Republic of Korea for colonial rule, guessing began on the purpose behind his speech.

Japanese Prime Minister Naoto Kan [Chinadaily.com.cn]

According to Kyodo News, sources from Japan's government indicated that Kan's apology was aimed at using Japan-ROK relations to counter China's influence.

Prime Minister Naoto Kan made a "heartfelt apology" to the ROK at a press conference after a cabinet meeting on Aug 10.

As Kyodo News reported, Kan emphasized that recent ties with the ROK are more stable and amicable than ever and declared his renewed determination to forge a better future for the two countries by looking to the next 100 years.

"The Asian economy is expanding very rapidly. Through the cooperation of Japan and the ROK, plus the US, the increased stability of the region can be achieved by these three nations, and this is very meaningful," Kan told AP after the apology had been issued.

"We appreciate it that the apology focused on the Republic of Korea. We believe that the latest statement is a major step forward," the Chosun Iibo quoted government spokeswoman Kim Hee-jung as saying.

One Chinese expert believes Japan is trying to huddle closer with the ROK.

"By focusing its apology on the ROK, Japan signaled its intention to lobby the ROK," said Huo Jiangang, an expert on Japanese studies in China Institutes of Contemporary International Relations.

Shen Shishun from the China Institute of International Studies said China is Japan's biggest trading partner and Japan still needs to rely on China.

"If Kan's apology is really aimed to counterweigh a rising China with a closer relationship with the ROK, there would be no advantage at all to Japan," Shen said.

Chinese netizens also expressed their opinions about Japan's apology on ifeng.com, a major Chinese news portal.

"I can't figure out why Naoto Kan wouldn't apologize to China," said one poster.

"Japan's apology is designed to enhance the US-Japan-ROK alliance. It is even possible that the US urged Japan to make the apology," another reader said.

Japanese also expressed their views on Kan's apology.

"This is a good opportunity for Japan and the ROK to heal old wounds," a visitor named 42 posted on after-hours-japan.com.

But some Japanese remain skeptical over Kan's apology.

"Koreans always say that an apology isn't sincere unless it is backed up with money. This new apology will backfire on Kan if he is not forthcoming with the cash," said a visitor named shakuhachi on after-hours-japan.com.