You can never miss "Onsen Manju" when you visit hot spring.
Manju is one of the Japanese tradition sweet bun filling with Anko (red bean paste) and especially the ones selling at hot spring (Onsen) area called "Onsen Manju".

In Nasu Shiobara city where has historical hot spring place, there are many kinds of Manju.
Please have bite some Onsen Manju while you visiting Shiobara, Itamuro hot spring!

Just like cakes, manju also have so many varieties depends on shops.
Surely you'll find your favorite one!