“A lot of the songs I wrote in my 20s are like diaries. I tend to write about my experiences at that time. If I hadn't done that, I would have forgotten everything. Because I've been so busy. When I listen to it after some time has passed, I reminisce and say, ‘Ah, that was the case back then,’ and I also realize, ‘My thoughts have changed this much now.’ “I go through the same situation again.”