“Fujikawa” is operated between Shizuoka (=静岡) and Kofu (=甲府) via Minobu line (=身延線). If you go to Mt. Fuji (=富士山) from west side, this train takes you to the gateway stations, Fuji or Fujinomiya. And also this is a short cut route from Shizuoka to Kofu. If you want to go to Matsumoto, Kobuchizawa or Lake Suwa from Shizuoka, ride on this train and transfer to Limited Express Super Azusa or Limited Express Azusa. This train is fully covered by Japan Rail Pass.
As you know, Mt. Fuji is the highest mountain in Japan. Sometimes we can see it even from downtown Tokyo. And when you travel to west from Tokyo by Shinkansen, you will be able to see this beautiful shaped mountain through the window on your right side.
*If you want to see Mt. Fuji on Shinkansen, when you reserve the ticket for Tokaido Shinkansen, try to get D which is isle side, or E which is window side unless you travel as party of 3. The seat configuration on Shinkansen is 3 (A,B,C) + 2 (D,E). (If you take Green seat, C and D are the right place to see it.) Even if you travel to opposite direction (from Osaka to Tokyo), the seat configuration is same. D and E are always on the mountain side.