Kenichi Horie, who has sailed nonstop around the world and crossed the Pacific in a solar-powered boat made of recycled aluminum beer cans, is getting ready for his next solo adventure.

In less than two weeks, Horie is expected to begin what he says is the world's longest voyage in a wave-powered boat. He plans to travel more than 4,000 miles from Honolulu to Japan aboard a 3-ton catamaran called the Suntory Mermaid II at a speed of up to 5 knots.

The boat, made of recycled aluminum, relies on the energy of waves to move two fins at its bow and propel it forward.

The journey, which would take a diesel-powered boat about 10 days to complete, is expected to take Horie about 2 1/2 months.

Horie, 69, said Tuesday at the Hawaii Yacht Club in Waikiki that he will carry rice, canned food, microwavable meals and beer on the trip. Solar panels on top of the catamaran will power a microwave.

"With so many people supporting me, even by myself, I won't feel lonesome," Horie said through a translator.

He will have a satellite phone and access to e-mail. He said he will take books to read and listen to the radio.

Horie said the boat is sturdy and designed to right itself if it capsizes. Still, it is equipped with an engine and 35-foot sail mast for emergencies.

"I still think he's crazy for doing this," said Howie Mednick, vice commodore of the Hawaii Yacht Club, adding the voyage will be "historical" and "amazing."

Ken Dota, who is promoting Horie's voyage, said the sailor hopes the shipping industry will eventually adopt the clean wave technology.

The journey would not be Horie's first time traveling the seas using green technology. In 1992, he powered a boat by pedaling from Hawai'i to Okinawa. And in 1996, he sailed nearly 10,000 miles from Ecuador to Tokyo aboard a solar-powered boat made from recycled aluminum beer cans.