Conversation so far:
What is the main point of the Abandoning a Cat: What I Talk About When I Talk ABout My Father article published for Japanese magazine BungeiShunju for Haruki Murakami?
Haruki Murakami recounts memories of his late father
What was the trauma in the article Abandoning a Cat for Haruki Murakami?
Haruki Murakami's father was involved in the Second Sino-Japanese War, and was deeply traumatized by it, which would in turn affect Murakami.
What was Haruki Murakami's first non-fiction book?
Haruki Murakami's first work of non-fiction was Underground.

Question: When did he return to Japan?
Self-contained rewrite: When did Haruki Murakami return to Japan?