Cancer sufferer Neil Grainger and a group of 18 supporters set off from Ikebukuro Station at 9 a.m. Sunday on an epic walk around Tokyo's famous Yamanote Line.

The 40 km "Yamathon" took the group (which swelled to up to 29 participants as more walkers joined them along the way) 14 hours and, according to Grainger, was harder than they anticipated.

"I'd recommend the walk to anyone, but don't underestimate the task.," he said. "It is a mammoth walk through sometimes crowded streets and it can be hard to get from station to station sometimes. However, if you plan ahead, get some good walking shoes, take a change of socks, and drink lots of fluids, there is no reason why anyone can't complete the journey in around the same time we did."