Will be travelling to Japan on 6th. April and return on 17th. April.
Plan to stay in Osaka and visit Kyoto, Nara & Kobe.
Already booked hotel (Ark Hotel) there @ RM380 per night for 2 pax.
Then travel to Tokyo (either by night bus or Shinkansen) and stay for 3 daysthere before return via Narita.

Only today have the time to post from the office here in Osaka.
For the last few days had been to Nara (Todaiji), Kyoto (Nijojo, Kiyomizudera and Gion) and Kurashiki for the beautiful canals.
Will be off to Tokyo tomorrow by Sinkansen (bullet train)

The normal business hotel I stay is around JPY 7,000 per night for single occupancy.
I am sure you can find some cheaper ones.
For subway tickets around Tokyo, you expext to spend about JPY 2,000 per day, depending on your travel plan.
Shopping no limit lah-depend on the purchases.
Foodwise will cost you about JPY 600 for breakfast and JPY 1,000 each for lunch and dinner.
Exchange rate-RM37 to JPY1,000.
No idea on the entrance fee to Disneyland but in Osaka, the fee to go into Universal Studio is around RM150.