BITTER AND SWEET AKINA NAKAMORI 8TH ALBUM · 2014-01-29 · CD · 10 positions on this issue.
“SO LONG（ソーロング）” occupies position 9, sequence number 9 of 10, on the WPCL-11728 edition of BITTER AND SWEET AKINA NAKAMORI 8TH ALBUM. This issue was released 2014-01-29 on CD.
It follows “恋人のいる時間”. The next position is “APRIL STARS（エイプリル スターズ）”.
Title and placement follow the cited official release page. The linked BITTER AND SWEET AKINA NAKAMORI 8TH ALBUM essay supplies musical context; this position does not independently infer writing credits, duration or a recording match with a streaming file.