Class java.time.chrono.JapaneseDate

Added Methods
JapaneseDate minus(TemporalAmount)  
JapaneseDate minus(long, TemporalUnit)  
JapaneseDate plus(TemporalAmount)  
JapaneseDate plus(long, TemporalUnit)  
JapaneseDate with(TemporalAdjuster)  
JapaneseDate with(TemporalField, long)