Osaka Castle | Popular hotels and Ryokan (Japanese inn) based on customer reviews!

Osaka sightseeing. What is the best hotel to stay at if you're going to Osaka Castle?

I'm going on a two-day trip to Osaka with a friend. On the first day, we plan to go to Universal Studios Japan. On the second day, we want to do some sightseeing in Osaka, including visiting Osaka Castle. Can you recommend a hotel for sightseeing around Osaka Castle?