Masato Kanda: The man behind Japan's $170bn bid to prop up the yen

For several years, Masato Kanda hardly slept."Three hours a night is an exaggeration," he laughs as he speaks to the BBC from Tokyo."I slept for three hours consecutively before being woken up but I then went back to bed, so if you add them up, I got a bit more."So why was this 59 year-old bureaucrat's schedule so punishing?Until the end of July, he was Japan's vice finance minister for international affairs, the…