Watch Document 72 Hours Season 8 Episode 12 Online

An indoor climbing gym in Kawasaki City, near Tokyo, gives climbers a venue to test their physical limit and improve their skills while experiencing thrills - and a sense of achievement - not often found in daily life. The facility's 4-meter-tall bouldering wall and towering climbing walls more than 10 meters high provide challenging obstacles for enthusiasts of all ages and abilities, ranging from novices to some of Japan's finest climbers. For 3 days, we spoke to the climbers determined to reach the top of these walls - and to overcome other challenges they face in life along the way.