Kii Mountains

Kii Mountains (紀伊山地) is a mountainous region covering most of the Kii Peninsula. They lie south of the Japan Median Tectonic Line (MTL) in Wakayama, Nara, and Mie prefectures. The mountains are arranged roughly northeast to southwest.

History
During the Heian period, Shugendō flourished in these mountains. In 2004 it became part of a UNESCO World Cultural and Natural Heritage site, under the name "Sacred Sites and Pilgrimage Routes in the Kii Mountain Range"

In the Northern regions of the mountains, Yoshino and Omine have the oldest sacred traditions where followers of Shugendo, have been practising their faith within the forests since the seventh century. Kumano Sanzan is in the Southern area of the ranges and has three significant Buddhist shrines devoted to nature worship. Around Koyasan, 117 temples represent over one thousand years of worship and are linked by networks of pilgrim routes through the steep peaks and glades of the Kii mountains.

Geography
The highest peak is Mount Hakkyō 1914.6 m in the Ōmine Mountains. Other peaks in the central group are Mount Shakka(1800m) and Mount Sanjō (1719m). To the East in the Daikō Mountains is Mount Ōdaigahara (1695m). In the South is Mount Daitō 大塔山(1122m). The Obako Mountains separate Nara Prefecture from Wakayama Prefecture.

Yoshino-Kumano National Park is located in the Kii Mountains.

Geology
Along with the Shikoku Mountains, the Kii Mountains form the outer arc of the Southwestern Japan Arc. The mountains are mostly domed upthrusts of sedimentary rock from the Cretaceous and Lower Miocene.