There are various types’ hotels in Hiroshima-city and other cities. The ordinal hotels serve a western style bed room with some amenities including slippers and nightwear, and you may be able to have breakfast for free in according to the accommodation plans. The price ranges of hotels are wide, so you can choose one appropriate to your budget and your plan.
Ryokan is Japanese-style hotel. They mostly serve Japanese formally arranged meal and some of ryokans have hot springs. The room is Japanese-style room and futon is spread on tatami mat when you go to bed. In Miyajima Island there are lots of traditional old ryokans, and then some ryokans have original services like massage and etc, and also have hot springs too. Moreover there are many ryokans that the front desk can speak in English. Ryokan is really good accommodations to know Japanese cultures.
There are other types accommodations like guesthouse, Minsyuku that is private home providing lodging for travelers, and some unique types like theme park.