You can check disaster information from here (Japan Tourism Agency)
http://www.jreast.co.jp/e/pdf/disaster_e.pdf
※英語のみ
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A convenient smart card that allows you to ride trains and buses and even shop with a single tap.
What’s a Suica (IC Card)?An attractive low price! Shinkansen from Tokyo to Karuizawa,
and unlimited travel on trains to popular destinations including Lake Kawaguchiko, Kusatsu, Nikko, and Izu.
Great for trips between Narita Airport and Tokyo, allows direct access to the city.
N'EX TOKYO Round Trip Ticket