I used to think when I was in my teens I was very different from my father, but now I see that what we do is probably quite similar.

I went many years without even associating Nagasaki with the atomic bomb. Then in the 1980s, when there was a new concern about CND and so on, Nagasaki took on this symbolic value. I felt my Nagasaki had been appropriated. It was suddenly this burning city of ashes. For me, it was where I lived until the age of 5.

When you are young, things like your moral stance and your political position seem very important. I'd spend long nights with my friends sorting out moral and political positions that we thought would take us through adult life. And part of that would end up meaning we despised some people not for what they did, but for the opinions they professed to hold.

I work very regular hours, roughly 9 to 5:30. I think I have it much easier than a lot of parents. I just sit at home, I have a very flexible timetable, and I'm very fortunate in that I don't have money problems. I have lunch with my wife at home. I don't have to commute, so I have much more time with my family.

I couldn't speak Japanese very well, passport regulations were changing, I felt British, and my future was in Britain. And it would also make me eligible for literary awards. But I still think I'm regarded as one of their own in Japan.

I'm interested in memory because it's a filter through which we see our lives, and because it's foggy and obscure, the opportunities for self-deception are there. In the end, as a writer, I'm more interested in what people tell themselves happened rather than what actually happened.