Sendai Ikuei defeats Kanzei 12-4 thanks to a 9-run 3rd inning, which means that Tohoku will indeed get 4 teams into Senbatsu next spring.
As I project, Moriokadai Fuzoku will be guaranteed a bid based on performance (I think the Meiji Jingu bid supersedes the Tohoku Memorial bid).
The question will be who will get the 4th and final bid. Sakata Minami is the other semifinalist, but a 10-1 loss to Sendai Ikuei hurts. Ironically, the great performance by Sendai Ikuei in the Meiji Jingu tournament may give Sakata Minami the benefit of the doubt.
The other team considered could be Aomori Yamada. They actually were leading Sendai Ikuei 3-1 going into the 9th during their quarterfinal, but gave up 4 runs to lose 5-3.
It has been a while since we've seen Aomori Yamada in the tournament, so it might be possible that they skip over to select them with the Tohoku Memorial bid.