Here is a little bit of what he talks about in regard to writing
Basically I agree with the view that writing novels is an unhealthy type of work. When we set off to write a novel, when we use writing to create a story, like it or not a kind of toxin that lies deep down in all humanity rises to the surface. All writers have to come face-to-face with this toxin and, aware of the danger involved, discover a way to deal with it...There's more, but really you should read the book.
Scott, Michelle, and I have sometimes talked about darkness in our stories. I think what Murakami's talking about touches on that same subject, though not necessarily directly. Nevets and Yat-Yee have also touched on the topics on their blogs. As I've been getting feedback from people about Wild Grass, I've had people tell me that some of the stories made them feel upset or uneasy. It's strange, because I don't necessarily set out to make people feel this way, but at the same time I do feel like it's somehow necessary to help the world in that vague way I try to help the world. I know Scott feels the same way.
Murakami goes on to talk about developing an immune system so that we can still write without injuring ourselves emotionally. I also think that's a necessary part of my writing process. Really, it's a fascinating book. Happy Friday Filler!