A disabled Japanese man on Friday embarked on an ambitious trip that will take him to a mediaeval French World Heritage site with the help of a cutting-edge robotic suit.

Seiji Uchida, 49, who lost the ability to walk in a car accident 28 years ago, said his trip to the picturesque abbey of Mont Saint Michel, set on a rocky islet in Normandy, will be only the beginning of his dream.

"Right now, I cannot stand on my own feet without help," said Uchida at Tokyo's Narita airport before his departure to France.

"But I will never give up on my hope of someday walking on my own feet, no matter how many years it would take."