Where to place large luggage for day trip to Hiroshima?

Hi everyone!

In Osaka now, but going to take a day trip to Hiroshima, followed by staying at a hotel in Fukuoka for the next leg of our trip.

While in Hiroshima, I'dike to leave my luggage somewhere. We have a few LARGE suitcases, but I'm not sure where to leave them. An ecafe perhaps?

If you have any ideas, please let me know!

by defire101