A signboard showing the cancellation of flights to Osaka and Sapporo is placed at Incheon International Airport on Friday. /Yonhap

Hundreds of comments in Japanese on President Moon Jae-in's Twitter account on Sunday apologized for the rude behavior of Japanese Prime Minister Shinzo Abe.

Earlier, Moon tweeted a message of commiseration for the victims of the earthquake in Hokkaido last Thursday, but Abe did not respond.

"I offer my consolation to the Japanese public as well as Prime Minister Abe, who suffered heavily from the natural disaster. I offer my condolences to the residents of Osaka and Sapporo who perished due to the typhoon and earthquake," Moon tweeted.

Abe ignored to Moon's message but tweeted his thanks to Taiwanese leader Tsai Ing-wen and Australian Prime Minister Scott Morrison for their own messages of commiseration.

It is unclear whether Abe thanked Moon through other channels. A Cheong Wa Dae official said, "We have open channels of communication with Japan for matters other than the earthquake."

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