On June 16, 2024, during the [#KitashirakawaKakapoBirthday2024] Birthday Recap / Second Half: Thank You for Super Chats [KitashirakawaKakapo/VEE] live stream, it was announced that there was a typo in the differential equation written by Dr. Kakapo himself, which was projected as the background for the premium release announced the previous day:
[Cover] KISS shite / KOH+ (covered by Kitashirakawa Kakapo) [Galileo/VEE]
The typo is in the second line of the equation on the left side of the blackboard:
Δj/Δt = a(2,1)r + a(2,1)j

Dr. Kitashirakawa Kakapo makes a fatal mistake during premium release | どんゆう's post