In 1907, Yoshitaro Shibasaki and his team successfully climbed Mount Tsurugi, which was regarded as the last unclimbed mountain in Japan. However, they found a metal cane decoration and a sword on the top of the mountain, and it turned out that someone had reached the top before them. A later scientific investigation revealed that the metal cane decoration and sword dated from the late Nara period to the early Heian period and that shugenja had climbed Mount Tsurugi more than 1,000 years ago.
From the wikipedia article for Shugendō
Shugendō is a mountain ascetic religious practice that emerged in the 8th century in Japan, that synthesizes Shintō, Buddhism, and various local spiritual elements. Because of its integrationist nature it was banned in the Meiji era when government land surveyors found that the ascetics [shugenja] beat them to the top of Mount Tsurugi by a thousand years. [via CraigMod‘s newsletter, where he discusses missing a Shugendō retreat because of XOXO and typhoons.