My apologies - it turns out it's APA hotels (still a Japanese brand) that are affiliated with Coast Hotels! Close but not the same. It was the IHG reference that had me look again, that definitely felt off. https://www.coasthotels.com/partners-affiliates Still, I can earn points with APA, sadly no redeeming - I ended up with quite a few during covid years.

The itinerary, however loose, looks great. I love the idea of a waterbus, didn't realize that was a thing in Tokyo!