some more options
Hi! I live in Kobe and I really recommend skipping Osaka castle. Everyone I know that has visited it was so disappointed especially after seeing a real castle in Himeji or else where.
If you have bought the rail pass go by Shinkansen to Himeji (only 16 minutes from Kobe or 50 minutes to Kyoto) which has a famous Sakura (Hanami) festival below the castle
*Castle info =:34: .jnto.go.jp/eng/location/regional/hyogo/himejijo.html
*autumn views of
Himeji castle taken by one of my friends =:34: flickr.com/photos/agricola/sets/72157594434265808/
*spring views =:34: flickr.com/photos/42615383@N00/136631480
* :34: flickr.com/photos/pigswillb/132573293
*
OR I KNOW A CHEAPER OPTION THAN THE TRAIN PASS:
The Seishun Juhachi Kippu (Seishun 18 ticket), is a seasonally available railway ticket (in Spring =March 1 to April 10), which gives you five days (the five days do not need to be consecutive days) of unlimited (except not Shinkansens), nationwide travel on local and rapid JR (Japan Railways) trains for only 11,500 Yen, or 2,300 Yen per day! And you can share the ticket with your friend as you are travelling together so one of you can travel for 3 days using the pass and the other for 2 days (then that person just has to pay the regular fares for that day) For more info about Seishun Juhachi Kippu:
*:34: .jreast.co.jp/e/pass/seishun18.html
*:34: .japan-guide.com/e/e2362.html
So for example you could use 2/5 of the ticket to go to Himeji overnight (plus a local train ticket each as the last train leaves Tokyo before midnight)
Day#1 Leave Tokyo 23:43 to Ogaki 06:53 change trains
#2 Ogaki 07:00 to Himeji 10:16am
#2 leave luggage in lockers at Himeji station and enjoy short walk to castle
#2 train to Kobe in afternoon to take photos at the Harbour and eat early dinner
#2 train to Osaka and still using your ticket take the JR loop line to a cheap hotel like Hotel Taiyo which has bunk-beds in the twin-share rooms if you book in advance =:34: .hostelworld.com/availability.php/HotelTaiyo-Osaka-8135
#2 then cheap subway ride to visit Minami area (Dotonbori, etc), which is the most interesting in the evening after people have finished work/school.
THEN
#3 Next morning have a sleep-in as you will be exhausted, and check-out at 10am to head to Kyoto to go sightseeing for the day.
( OR as an option, spend the day at Universal Studios Japan as it is near there, and I think it is more enjoyable than TDR if you are a movie fan like me
#3 Take loop-line and rapid train to Kyoto (890yen each)
#3 Spend the night at a cheap hostel or internet cafe in Kyoto
THEN
#4 Return to Tokyu using 2/5 of your Seishun 18 ticket and then do what you have planned there and go on your Mt.Fuji bus tour
OR
#4 On your way back to Tokyo using 2/5 of your Seishun 18 ticket stay at the youth hostel at Lake Kawaguchi-ko. You not have to be a member to stay and you can have the chance to talk to lots of young Japanese as the universities will be on Spring break. You can also have a traditional hot spring bath and get lots of advice from the people working there as they speak English and often have people on a tight budget staying there.
The Kawaguchi-ko lake district is famous for its views of Mount Fuji, hot springs (onsen) and luxury ryokan's. Mt. Fuji is reflected on the surface of Lake Kawaguchi-ko which always makes a fascinating photo. From Kawaguchiko Station, you can take a mountain bus called Tozan Bus that takes you to the 5th level of Mt. Fuji, (2000yen each for a Round trip ticket).
THEN
From Kawaguchiko station to Tokyo station it costs 2,560 yen each so use the last 1/5 of your ticket for one of you.