On the other hand, he has the commercial interests of the UK's banks and businesses to protect, and he fears that a more closely-knit eurozone would seek to rig the single market to the detriment of Britain.

BBC: Eurozone banking union that works for Britain?

Tetsunari Iida, an engineer-turned-industry critic, said the situation is "beyond the reach" of Japan's closely knit nuclear establishment.

CNN: STORY HIGHLIGHTS