The thing is though, Robo's sales on Oricon have actually already deteriorated from Volume 1. Volume 4 left the top 100 at around 78k, leaving the top 50 at 67753 copies. Volume 3 did 78k before dropping out of the top 50. It started out as the best selling series of the 6in round but eventually became the lowest, barely being outsold by Stone last volume. Stone dropped out of the top 100 at 80500, dropping out of the top 50 at
│*52117 (5)│*71288│------│------│------┃*,*71,288 (*12)┃2018/04|Dr.STONE 5
It remains to be seen if its able to stop dropping and stay steady and I know I said its not up for cancellation yet simply based on those print numbers, but again, its in a weird situation.