If you are considering to lower your expenses, pls stay in Asakusa, this is area of cheap ryokan and hostels. And most cheapest & convenient to travel to Narita airport. (There's 2 airport in tokyo, make sure u get the right airport.)
From here you can travel to most of interesting spots in Tokyo.

I stayed in 2 of these hostel.
khaosan tokyo -> http://www.khaosan-tokyo.com/en/
This was the cheapest & great hostel I found last time i traveled. Con is cleaniness so so only. Old building, but nice rooftop view and just next to the river, I managed to stay in a room with river view, very nice scene. no private bathroom, but I like the toilet WC there, sit down type->got different water pressure to wash and got hot air to blow dry ! less than 5 minutes walk to LRT, I feel thankful coze during checkout, I got lots of luggage and only short distance for me to jump on train to airport.

This is a bit pricy but still cheap. Very quite and very very very clean, nice place. Walking distance to LRT. more than 5 minutes but still short distance. here the living room is tatami style. U can enjoy the decor here.
http://www.hostelworld.com/hosteldetails.p...sou-Tokyo-15493

I will comment things I know about Tokyo.

Day 1: Tokyo (Friday)
============
1. Arriving at airport at evening
2. Check in ryokan
=> Goto Ueno Night market, dinner there. ueno is very good place to shop
3. Dinner and take a walk in Shinjuku => shinjuku is famous for it's busy ppl crossing scene at big junctions. go up an overhead bridge and catch the fantastic view. The later the better. More n more people flooding up the junction to cross.

Day 2: Tokyo (Saturday)
============
07.00-08.00 Breakfast
08.30-10.00 Asakusa - Sensoji temple
10.00-12.00 Akihabara => u can skip if you are not buying gadgets or electronics, comics, cosplay etc
12.00-13.00 Lunch
13.00-15.00 Amlux
15.00-19.00 Harajuku / Shibuya =>harajuku is a must, great fashion trend shops...
19.00-20.00 Dinner

Day 3: Osaka (Sunday)
============
07.00-09.00 Tsukiji Market
=>I got up 4am, were there before 6am to view the bargain market of Big Tuna fish, must have your breakfast there, most fresh sushi and sashimi in town
10.00 Train station
10.15-13.00 Shinkansen to Osaka
13.00-14.00 Lunch
14.00-15.00 Osaka Castle (600Y) & Hokoku Shrine (Open until 17.00)
15.00-16.00 Shintenoji Temple
16.00-19.00 Namba, Shopping
19.00-20.00 Dinner
20.30 Train Station
20.30-21.30 Shinkansen to Kyoto
22.00 Check in Hotel
If got time, we go Sento Spa (350 Y)
Day 4: Kyoto (Monday)
============
07.00-08.00 Breakfast
08.45-09.45 Nijo Castle (600Y) (open until 16.00)
10.00-11.00 Kinkakuji (400Y) (open until 17.00)
11.00-12.00 Imperial Palace (free)
12.00-13.00 Lunch
13.00-15.00 Gion & Kiyomizu Temple (bicycle) (300Y) (open until 18.00)
15.00-16.00 Sento Spa
17.00 Train Station
17.30-20.00 Shinkansen to Tokyo
20.00-21.00 Dinner

Day 5: Tokyo (Tuesday)
============
08.00-09.00 Breakfast
To be continued.....

Oh yes, for the JR pass, I intend to buy here. May I know if I activated the pass on 28th Mar, when is the last day for using it? Will it be 3rd or 4th of Apr?

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try your very best to slot in City Hall visit 1st, take a free lift to cityview deck. you can have almost 360 dgree city view. and at the ground floor, there is a tourist information office, with maps of each area in tokyo. And oso lots of information about travel destination for tokyo and surrounding. the officer speaks english. All info is color printed, and it's free.

Dun buy Jap phone, u can't use it here. And the only phone network usable for our phone is 3G, if u do not hav it already, and u do not really need it, just buy a IDD card for your normal callback to malaysia.

sometimes there's a daily pass promotion for metro in tokyo, and only can be purchase at airport. checkout their website or the airport websites for any promotions for tourist.

hi there, for khaosan hostel, choose the main hostel(the 1st n old one).
U have 3 train/metro lines ard this hostel area. Short walking distance. the nearest one, is just in front of the block.

Khaosan Smile is a bit further across the bridge, this is 2nd hostel. there's a pub here which any khaosan hosteler get 1 free drink each nite. I never tried, quite a walking distance to go there from 1st hostel.

Seems that they now hav 3rd hostel, hmm... good business i guess.

pictures, I wil try searching back. I think I got some...