Fall or spring semester at Sendai’s Tohuku Universität – coming from Bavaria , Germany

Hi everyone, I would be grateful if you can you can offer some insights about Sendai and it's weather in particular.

I come from Bavaria Germany and I just got accepted for an international semester at tohuku University. And Since I've never been into Japan before , I would take your opinion as arguments whether I start my exchange semester during fall or spring.

I would like to have the most of time while being in Japan, in oder to explore the country and embrace the culture. And the weather is a big factor to consider

Fall semester : October – March Spring semester : April – September

The pros of the spring semester: are the festivals that take place during the time.
While fall semester really highlights how colorful Sendai nature will be. Besides the easier access to Winter sports.

Any general tips are also appreciated.