Sapporo - Tokyo Suggestions

Hi all!

We'll be travelling from Sapporo to Tokyo on May 4th and given how long the trip is we wanted to stop in Tohoku on our way back.

We are considering Sendai for the Daikannon and Matsushima Bay. If we take the first Shinkansen from Sapporo we'll be in Sendai at around 1:30PM. Do you think there are better places we should consider stopping at?

(Worth mentioning, on our way up to Hokkaido from Tokyo we will stay overnight at Aomori and visit Hirosaki).

Thanks in advance