Here are some helpful links for Yokota Air Base:

Yokota AB, Japan
http://www.yokota.af.mil

374th Force Support Squadron (MWR)
http://www.yokotasupport.com

Yokota Officer's Spouses' Club
http://www.yosc.org

Yokota Ads
http://www.yokotaads.com

Train Information

JR East (Fussa-Shi and many other major cities)
http://www.jreast.co.jp/e/info/map_a4ol.pdf

Kanagawa Railway (use for traveling Kamakura area)
http://www.kanagawa-kankou.or.jp/english/access/railmap.pdf

Tokyo Metro
Tokyo Subway 

Hyperdia (Train Schedule)
http://www.hyperdia.com