Conversation so far:
What is Love Jam by Ai Otsuka?
Love Jam is the second album by Ai Otsuka
What was the first single from the album Love Jam by Ai Otsuka?
Ai Otsuka's fourth single Happy Days

Question: What position did this song reach on the charts?
Self-contained rewrite: What position did the song Happy days, the fourth single by Ai Otsuka reach on the charts?