The best resources available online. Many have limited English, so something like Google Translator may be necessary for best use.
SAKE GLOSSARY by the Society of Nada Sake Research (translation by Philip Harper)
The greatest glossary ever compiled for sake brewers. Full of helpful details.
National Research Institute of Brewing Website
NRIB conducts advanced analysis and evaluation of alcoholic beverages, as well as fundamental and applied research on brewing, and disseminates knowledge.
The Brewing Society of Japan
The Society offers brewers information on brewing technology through research and investigation in addition to presiding over the "Nippon Jōzō Gakkai", conference as well as educating brewers in technical skills.