Prime Minister Yukio Hatoyama met with U.S. President Barack Obama Wednesday for the first time amid concerns that the new Japanes government's policy could harm the two nations' long-standing alliance centered on the bilateral security treaty. Mr. Hatoyama apparently avoided friction by skirting touchy topics, but there remain tough problems of which he will not be able to easily steer clear.

The concerns stem from the Democratic Party of Japan's call for a close but "equal" alliance in which Japan is not subservient to the United States, and from the possibility that the DPJ-led government this January will end Japan's fueling mission in the Indian Ocean. This mission has been part of the efforts to fight terrorism and help reconstruct Afghanistan. It also seems likely that Japan will request relocation of the U.S. Marine Corp's Futenma Air Station to outside Okinawa Prefecture.

In the 25-minute meeting, Mr. Hatoyama said the bilateral alliance continues to be the central pillar of Japan's security policy and expressed the hope of deepening it. Mr. Obama said U.S.-Japan relations, in a wider sense, are very important not only for the two countries but also for the world. He also told the press that the alliance is the cornerstone of the two nations' security and economic prosperity and will be stronger in the 21st century.

Mr. Hatoyama said that the mood of the meeting was congenial and that he was able to build "some sort of trustful relationship" with Mr. Obama. But this is mainly because he and Mr. Obama avoided potentially contentious issues — the Indian Ocean refueling mission and the Futenma airfield. As for Afghanistan, Mr. Hatoyama said Japan will contribute through humanitarian assistance including farming aid and vocational training.

Mr. Obama's November visit to Japan will be an extremely important occasion in determining the future shape of Japan-U.S. relations. Mr. Hatoyama needs to carefully consider how to handle Japan-U.S. relations overall, as well as to push for concrete cooperation with the U.S. on various issues, including the economy, climate change, nuclear disarmament and North Korea.