The high mountain chain called the" Yari-Hodaka" range, separat ing the head streams of the two river valleys, namely Azusa-Gawa on the east and Gamada-Gawa on the west, keeping altitudes of morethan three thousand meters, along the distance of two kilometers, is the most remarkable mountain wall in the so-called " Japanese Alps." The peaks running from north to south, Yari-ga- Take (3,179.5 m.), Obami-Dake (3,100.0 m.), Naka-no-Take (3,100.0 m.), Minami-Dake (3,032.7 m), Kitahodaka-Dake

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... 0 m.), Karasawa-Dake (3,103.1 m.), Okuhodaka-Dake (3,190.0 m), Maehodaka-Dake (3,090.0 m.) are included in this region. And considering the abundant supply of snow in relation to the making of glaciers, this mountain region has been proved most interesting to several geographers who maintain either the glaciation theory or the nivation theory.