Mitsuru Nikaido YouTube Channel

Does anyone know anything about the dojo behind this YouTube channel:

https://www.youtube.com/@mitsurunikaido8599

Because of the YouTube videos I have been watching during my 8 months (and counting) of Long Covid, their videos popped up in my YouTube feed, and I am hooked. I neither read nor speak Japanese, but their videos do make me feel like I'm sitting in on a class. You see all the personality types. I really enjoy these videos, and it makes my day when new ones drop.

However, because I neither read nor speak Japanese, I know nothing about them. I've tried different searches on Aikiweb and with search engines and found nothing. If anyone knows anything about these guys, I'd love to know. Thanks.

The banner at the back of the hall in video https://www.youtube.com/watch?v=SJlRWc_dy7w reads something like...

"Sapporo International Aikikai 30th Anniversary Demonstration"

The photos on this website appear to match some of the videos: https://www.sapporoaikidokai.com/

Thanks!