|Hill Size:||HS 100|
|Hill record:||106.0 m (Eric Frenzel , 2007-03-02, NC-WSC)|
|Official hill record:||102.0 m (Adam Małysz , 2007-03-03, WSC)|
|Hill record:||103.5 m (Taku Takeuchi , 2011-08-20)|
|Hill record:||103.0 m (Sara Takanashi , 2014-01-11, L-WC)|
|Hill record:||105.0 m (Sara Takanashi , 2020-10-29)|
|Inrun length:||79.6 m|
|Take-off length:||6.4 m|
|Take-off height:||2.33 m|
|Year of construction:||1969|
|Conversions:||1983, 1990, 1996, 2005|
|Ski club:||SA Sapporo|
|Coordinates:||43.039803, 141.294785 ✔|
The first skiing courses in Sapporo were offered in 1909 by German university teacher Hans Koller. In March 1917 the construction of a first snow jumping hill at Mikadoyama followed and one year later a permanent wooden K20 hill was set up there. Nearby a 50 meter hill was set up in 1922 and one year later a K25 training hill was added.
Instead of enlarging the Snowbrand ski jump next to Ōkurayama large hill for the Olympic Winter Games 1972, in 1968 the new-construction of Miyanomori started in 1968. The K86 hill with its stadium with a capacity of 30,000 costed 395 million Yen and was officially inaugurated in November 1970. At the Japanese triple-victory on the normal hill event in 1972 Yukio Kasays won the Gold medal in front of 20,000 spectators.
In 1983 the ski jumping hill was enlarged onto K90 and equipped with plastic mattings for summer use. Another modernization followed in 1990, when an aluminium track with cooling system was installed in the inrun. A ceramic track was then put in place in 1996.
From 1980 to late 1990's Miyanomori had been regular host of World Cup competitions. This K90 hill was also part of the Nordic Ski Championships 2007, which was the very first WSC hosted in Asia. In advance it was modernized in 2005.