Now, it looks like Koshien is tomorrow already. The "day before" stream is underperforming HARD in relation to 2022 and 2023. Here is for the other years
>peak :: date :: title :: nameEn :: video_id
>65125 :: 2021-08-12 :: にじさんじ甲子園2021 大会直前!前日特番【 #にじさんじ甲子園 】 :: Nijisanji :: rX6ODupqCwM
>101488 :: 2022-08-11 :: にじさんじ甲子園2022 大会直前!前日特番【 #にじさんじ甲子園 】 :: Nijisanji :: zE9WP1N12yM
>94194 :: 2023-08-10 :: にじさんじ甲子園2023 大会直前!前日特番【 #にじ甲2023 】 :: Nijisanji :: RGf2CS7c0aE
>64968 :: 2024-08-09 :: にじさんじ甲子園2024 大会直前!前日特番【 #にじ甲2024 】 :: Nijisanji :: qyf1J0oT1yk

It's doing better than last year's one but last year was in itself another massive underperformance.
Based on the performance of the streams themselves and everything other than the draft, it looks like it won't be beating the numbers for 2022 and 2023.

With that said, nobody can really say anything about Niji magic numbers so, yeah, let's see how it goes tomorrow.