Tokyo Metro on alert after London attacks

Like the UK and the US, Japan is a G-8 nation with troops in Iraq. And it's aware that it fits the profile of an al-Qaeda target. The Mainichi Shimbun reports (in Japanese):

ロンドン同時爆破テロを受け、地下鉄を運行する東京メトロは７日夜、全職場に警戒強化の指示を出した。

My translation: "Responding to the simultaneous terror explosions in London, the Tokyo Metro, which operates the subways, has, as of the evening of July 7th, urged extra vigilance at all posts."