Green tea infused onsen in Ureshino

Hi folks,

We will be passing Ureshino Onsen from Nagasaki to Saga/Takeo Onsen. We heard the area is famous for green tea and there is an onsen infused in greentea.

We were recommended by Kyushu Tourism Centre to try Ryokan Warakuen for the greentea infused onsen, but they are only open at 11:30am and may decline day tripper if the place is too crowded.

Any other suggestions to another greentea infused onsen place, or perhaps where we can enjoy authentic greentea while in the area? We have up till lunch time, then we need to go to Yutoku Inari Shrine in the afternoon, before ending that night at Takeo Onsen.

Much appreciated.