%0 Journal Article %A M. Kino %A F. Takahara %A K. Hada %A K. Akiyama %A H. Nagai %A B. W. Sohn %B ApJ %D 2015 %G eng %P 30 %R 10.1088/0004-637X/803/1/30 %T Magnetization Degree at the Jet Base of M87 Derived from the Event Horizon Telescope Data: Testing the Magnetically Driven Jet Paradigm %V 803