This warm abode of Kasaoka is a delightful place to visit in Japan. The nearest major city to Kasaoka is Hiroshima. Hiroshima, is a worth visiting city owing to its prime attractions like Hiroshima Peace Memorial Park, Hiroshima Castle, Shukkei-en. Most online packages to this city are of 1-2 days.
Yes,it is that simple really! Enjoy your trip! Keep travelling!