^ Perhaps she requested Budokan? I don't know how J=J sells compared to Anju with such events, but that might also factor into it ("Can we actually sell enough seats?").
Sasaki is one of the most popular members of all of H!P, and she also has some mainstream visibility through her modeling.
Uemura is the leader of her group, and the last remaining original member, but other than that she’s mid-tier. She wasn’t as popular as Miyamoto or Inaba, and she isn’t as popular as Dambara or Inoue.
I was expecting double Yoko Arena for them. I think they both earned a send off at a bigger than Budokan venue. Uemura has 10+ years in H!P and is a group leader for years. She should have gotten the Take-chan and Fukumura treatment.