@endoftheline There is a direct line of causality from the Bookworm anime to my being here, so I don't doubt the influence of anime on sales.
I just thought of another useful subset: the most recent tranche of new series. As these all started at the same time on JNC, they should be fairly equal on recency bias, so it should be a pretty fair comparison.
spoiler
And I think these are the previous tranche of new titles
EDIT: Spoiler tags are triggering a bug making this text inaccessible, so I've removed them
22858,2021-10-25,A Late-Start Tamer's Laid-Back Life,,
23021,2021-10-13,Hell Mode,,
23428,2021-12-03,Full Clearing Another World under a Goddess with Zero Believers,,
24571,2021-09-08,My Daughter Left the Nest and Returned an S-Rank Adventurer,,
33011,2021-12-09,Private Tutor to the Dukes Daughter,,
36016,2021-09-10,Chillin in Another World with Level 2 Super Cheat Powers,,
52295,2021-06-28,Reborn to Master the Blade: From Hero-King to Extraordinary Squire,,
55087,2021-09-27,Dahlia in Bloom: Crafting a Fresh Start with Magical Tools,,
60004,2021-09-27,Min-Maxing My TRPG Build in Another World,,
93801,2021-09-27,The Reincarnated Princess Spends Another Day Skipping Story Routes,,
160525,2021-11-19,Endo and Kobayashi Live! The Latest on Tsundere Villainess Lieselotte,,
183085,2021-09-13,Dragon Daddy Diaries: A Girl Grows to Greatness,,
486307,2021-12-10,"Goodbye Otherworld, See You Tomorrow",,
I'd like to point out that compiling this data is also a service to any time-travelling JNC license acquisition editors. You're welcome.