Lecomte will swim for eight hours a day before resting on the 20-metre support boat that will accompany him throughout the journey.
The team, working with 12 scientific institutions, including NASA and Woods Hole Oceanographic Institution, will conduct oceanic and medical research throughout the journey.
After successfully completing the Atlantic swim, Lecomte vowed "never again" to set off on a long-distance sea journey.
Open golf spot via qualifier
There were 14 players who qualified from the site, including Denmark's Thorbjorn Olesen , who won the Italian Open on Sunday. The 37-year-old Australian has played the last five weeks on the PGA Tour in an attempt to improve his world ranking.
When Ben Lecomte stepped on to land for the first time after swimming across the Atlantic Ocean in 1998, he told himself "never again". "Rather than calling it an island of trash, it is more like plastic smog throughout the ocean".
"The mental part is much more important than the physical".
"I remember my father and he was the one who taught me how to swim in the Atlantic".
"When I was little and I was with my father walking on the beach, I didn't see any plastic, or hardly any. It's a problem we created and there is a very easy solution to start reversing it-single-use plastics for example, if we stop using them that will make a big change". However, his achievement was not documented, therefore it is not recorded in the Guinness Book of records.
Ten lingering thoughts: Game 3 of the 2018 NBA Finals
But I think having guys that get so excited about a good play, a good block or a good rotation or a good shot or dagger shot. And that allowed Kevin Durant to conserve some energy en route to a stunning game-high 43 points on 65.2 percent shooting.
"It is mind over matter", said Lecomte, who is also an architectural consultant based in Austin, Texas when not in the water.
A crowd of around a few dozen people gathered at the beach in Choshi, a couple of hours from Tokyo, to see the swimmer off. Lecomte, wearing a wetsuit and flippers, drew cheers as he set off doing a brisk crawl.
"The worst thing that can happen is not knowing what you are going to do with your mind and going to the wrong place", he said. Ahead lie several months of unpredictable and at times turbulent weather, extremely cold water, not to mention the danger posed by sharks and jellyfish.
However, Lecomte could not wait to get started.
Warriors take 3-0 lead against Cavs
In the game's final stage, Golden State was better, leaving James to compare his opponent to a gold standard in a different sport. But after an Andre Iguodala dunk, Durant canned a 33-footer to put the Warriors up six - 108-102 - with under a minute to play.
'It made me think what (the) future for my kids is going to be like.