Conditional oppose. The three examples given are sub-categories of Category:Comics titles by company, while this is a sub-category of Category:Books by publisher. If J-Novel Club is a book publisher then nothing should change. If it is a comic publisher, then the category should also change. Gonnym (talk) 10:03, 1 August 2021 (UTC)[reply]
Then probably the best solution, since we have two competing naming conventions, is to create a Category:J-Novel Club category which then holds both titles and books sub-categories. Gonnym (talk) 09:14, 5 August 2021 (UTC)[reply]
@Gonnym: Yen Press, Vertical, and Seven Seas all share one category for both novels and manga though. How is this any different than that? Link20XX (talk) 14:45, 5 August 2021 (UTC)[reply]
@Oculi: So then what about the others I just listed? As-is, they both have novels and manga. Should that be adjusted? Link20XX (talk) 22:22, 5 August 2021 (UTC)[reply]