@Override public JapaneseDate dateEpochDay(long epochDay){
  return new JapaneseDate(LocalDate.ofEpochDay(epochDay));
}

@ Override public JapaneseDate dateEpochDay ( long epochDay ) { return new JapaneseDate ( LocalDate . ofEpochDay ( epochDay ) ) ; }
obtains a local date in the japanese calendar system from the epoch - day .
