Lecomte left at 8am local time on Tuesday from Choshi, which is northeast of Tokyo in the neighbouring Chiba Prefecture.
He is expected to swim eight hours daily on a journey that could take six to eight months and will cover about 8,000km.
“For the moment we know he left and everything went well,” Mr Borreil said.
Lecomte completed a similar swim across the Atlantic in 1998, covering about 3,700 miles in 73 days. He has spent seven years preparing for his upcoming journey organisers said.
He is doing this swim to raise awareness about the health of the world’s oceans and the threat of pollution.
“The mission of my historic swim is to bring to light the current state of our oceans,” Lecomte, 51, said in a statement. The research we collect during ‘The Swin’ will ultimately help us better protect our oceans.
Scientific teams accompanying Lecomte will collect more than 1,000 water samples and study plastic pollution, mammal migration and the effect of extreme endurance events on the human body.
We couldn’t be more excited to travel alongside Ben and bring ‘The Swim’ to life for viewers worldwide,” Caroline Smith, Seeker’s chief content officer, said in the statement. “Not only are we documenting history, but we will be creating never-before-seen content in real-time from deep in the Pacific.
“You learn a lot about yourself. You learn what you can do, how much you can push, how much you cannot push,” Lecomte, a Texas resident who was born in France, said in an interview with Seeker.
“It’s my limits it can change from one day to another but you try to learn from that and to push it further each day.
Lecomte understands the various challenges that lie ahead, including weather issues, health concerns and threatening marine life, he said.
What Bothers Me The Most I Think Is Jellyfish,” Lecomte, Who’ll Wear A Wetsuit, Said. “It’s Very Difficult To Swim If There Are Jellyfish, Especially If They Are Bunched Together.
He Understands That Such Challenges Could Cut The Swim Short.