It hasn't been decided yet but will be on September 7th 2012. The contenders are Istanbul, Tokyo and Madrid :)
This has not been decided yet (it will be decided in 2013). The candidate host city locations are Istanbul, Madrid and Tokyo.
Toyko, Japan, Istanbul, Turkey or Madrid, Spain according to the ask.com encyclopedia article 2020 Summer Olympics. The winning city will be announced in September 2013.
The Olympic games in 2020 will be help in Tokyo.
The 2020 Olympics will be held in Tokyo, Japan.
It is written:　スポーツ
The 2020 summer olympics are to be held in Tokyo, Japan.
Motto of Olympics 2020
In 2020 in cambodia
No, they have not. But they have the potential to win the bid for the 2020 Olympics as they are one of three on the shortlist.
The next summer Olympics will be held in 2020 in Tokyo.