Found an English-language page in NH's web site.
http://svc.ana.co.jp/amc/plabro/link-p_e.html

Also at the Star Alliance official web site, SFC is recognized as Star Gold.

Choose ANA Super Flyers Club in the 'Select your status here' section at:
http://www.star-alliance.com/isroot/SA/htmen/3_0.htm