Namban Rengo was well represented in the 5th Oxfam Japan Trailwalker event over the weekend of 14–15 May. The grueling 100-km challenge starts in Odawara and traverses rugged mountain ranges through the volcanic caldera of Hakone National Park before finishing at Lake Yamanaka. Less race than physical challenge that pits man (and woman) against nature, Trailwalker was held about a month later than usual this year because of the Great East Japan Earthquake and Tsunami. Teams of four must complete the course within 48 hours, signing in together at eight check points along the way.