We spent 3 nights at Khaosan Tokyo Original Guesthouse:
4 of us took the 4 Beds Private Room with 2300yen per person.
All beds are bunk beds with shared bathroom.
Cozy living room with free Internet Wi-Fi access and PCs.
Travel information sharing section:
Sharing washing space
Staircase (not equipped with lift)
Kitchen with coffee and tea provided.
We can have our simple breakfast here:
Address: 2-1-5 Kaminarimon, Taito-ku, Tokyo