Japana Esperantista Go-Asocio: http://homepage1.nifty.com/mori_kin/jega/
Esperanta GO-Terminaro de Mori Hitoshi: http://homepage1.nifty.com/mori_kin/inpaku/enhavo.htm
Goa Terminaro: http://www.sunshadow.de/go/terminaro/
Esperanto Wikipedia pages about go: http://eo.wikipedia.org/wiki/Terminaro_de_Goo
Esperanto go links: http://russcon.org/esperanto/links.html#goo
Charles Matthews Some interesting definitions here, as far as I can gather; and at least not copied from existing sources, as so many web sites are.
HolIgor: As far as I can gather this is not the explanation of the Japanese terms to people who speak Esperanto, this is introduction of the Esperanto terms to people who speak Japanese.