You cannot just dispose large-sized trash or electric household
appliances with other ordinary garbage in Japan.  

If you have unwanted furniture with dimensions of
30 cm or more, electric household appliances,
bicycles and such, you need to call your local
Large-sized Waste Reception Center and
make an appointment for collection.
 
They will tell you how much it'd cost on the phone so
you must purchase a Large-sized Trash Fee Sticker*
at a convenience store, write your name on the sticker
and attach the sticker to your garbage before disposal.

They will also tell you the garbage collection point  and
pick up date on the phone.
Do not leave the garbage outside before the collection date.

For more information, please contact your local ward office.

Also see this Shibuya's 'How to Sort and Dispose of Resources
and Garbage Properly' list: 
http://www.city.shibuya.tokyo.jp/env/gomi/pdf/gomi_eg2.pdf

* called "Sodai gomi shori-ken"

Tokyo Sodai gomi shori-ken (sticker colors may vary)

"Sodai gomi shori-ken Sold Here"
Look for this poster at your local convenience store

[Example of collection fees - please check with your local ward office]
- chair: 500 yen -
- bicycle: 1,000 yen -
- bed: 3,000 yen - 
- video player: 500 yen -
- PC: 2,000 yen - 
- TV: 2,500 yen -