Lockers at Shin-Suizenji station

I am planning to go by rail from Hakata to Aso. Along the way, I am looking to stop by Suizenji Koen. As I would have to bring my luggage with me, does anyone know if the Shin-Suizenji Station (along the JR Hohi line) have any big lockers or left luggage facilities?

The official JR Kyushu website mentions coin lockers being available, but nothing about sizes. It is a small station. I personally would not count on large sized lockers being available:
http://www.jrkyushu.co.jp/EkiApp?LISTID=502&EKI=91304180

Thanks Uji, that's certainly very helpful. In this case, I would probably have to hope that I can leave my luggage at the office of Suizenji Koen.

Indeed, in case that there are no large enough lockers, I would kindly ask the station master.

That's a good note. Million thanks Uji and you have been very helpful!