Nobi-Nobi seat is on the column furthest to left, the one with a person sitting on a couch, a symbol for Shiteiseki (指定席) which is Nobi-Nobi seat. You can ride on sleeper compartments, which is on right side column the one with rectangular box with “A” and “B” which represents beds, using JR Pass. For sleeper compartments you have to pay sleeper surcharge (寝台料金) portion of the fare.