KKR Hotel Osaka would be an excellent value on the merits of the surprisingly large room and hotel facilities alone, but the castle view makes it an absolute steal. Be sure to take advantage of the hotel shuttle if traveling via Shinkansen to Shin-Osaka station, as it's a long walk from uphill from the nearest subway station. Enjoy a latte or a float from the Cafe Atrium, then admire Osaka Castle across the street. As you settle in for the night, enjoy incredible views of the castle. I would absolutely stay at KKR Osaka again.