Japan National Tourism Organisation: http://www.jnto.go.jp/eng/location/festivals/
*黄金週間/ おうごんしゅうかん: Golden week (or ゴールデンウィーク) is from 29th April and 3rd to 5th May. People usually takes leaves to link the days missing to form a longer holidays.
**Some holidays may vary by few days depending on the lunar calender every year.
 Japan Rail Pass: http://www.japanrailpass.net/eng/en012.html