Story highlights Solar plane, diverted by weather, touches down in Nagoya, Japan

Pilot had hoped to make the six-day journey to Hawaii

Solar Impulse team is attempting to fly around the world powered only by the sun

(CNN) The Solar Impulse 2 -- diverted by weather from trying to fly all the way from China to Hawaii without using a drop of fuel -- has landed instead in Japan.

The plane, which two pilots aim to fly around the world powered only by the sun, landed late Monday in Nagoya, about 320 kilometers (200 miles) west of Tokyo.

"Of course we are a bit disappointed not to have made the flight nonstop to Hawaii, but elated that our solar airplane made such a great demonstration of the potential of clean technologies by flying 2 days and 2 nights without fuel!" said Bertrand Piccard, Solar Impulse chairman and one of the pilots, in a statement.

The trip to Hawaii was expected to be the toughest leg of the Solar Impulse's round-the-world voyage. It was scheduled to take five days -- and maybe a bit more -- with just one pilot.

The 8,000-kilometer (4,971-mile) journey from Nanjing, China, to Hawaii -- dubbed the "moment of truth" by alternating pilots Andre Borschberg and Piccard -- had already been delayed several times because of poor conditions over the Pacific.

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