Indeed, no Demon Slayer: Kimetsu no Yaiba volume was in the top 50 ranking for the first half of 2019.
Demon Slayer: Kimetsu no Yaiba took the top 19 slots on the ranking chart, and each of its first 19 volumes sold over two million copies in these past six months.
The Demon Slayer: Kimetsu no Yaiba television anime aired from April to September 2019.
This list covers sales surveyed from November 18, 2019 to May 17, 2020.