| Medal record | ||
|---|---|---|
| Women's snowboarding | ||
Representing  Japan
| ||
| World Championships | ||
 |
2007 Arosa | Halfpipe |
| Asian Games | ||
|
2007 Changchun | Halfpipe |
Soko Yamaoka (山岡聡子, Yamaoka Sōko, born 29 May 1974 in Nagano) is a Japanese snowboarder. She has competed in the halfpipe event at the 2006 Winter Olympics, where she placed 10th, and the 2010 Winter Olympics, where she placed 16th.[1] She also competed at the World Snowboard Championships from 2003 through 2009.[2]
