concrete GrammarJpn of Grammar = 
  NounJpn,
  VerbJpn, 
  AdjectiveJpn,
  AdverbJpn,
  NumeralJpn,
  SentenceJpn, 
  QuestionJpn,
  RelativeJpn,
  ConjunctionJpn,
  PhraseJpn,
  TextJpn,
  StructuralJpn,
  IdiomJpn,
  TenseJpn 
  ;