How many days should I spend in Osaka? I recommend at least 5 days to see the must-see of the Kansai region, namely Osaka and Kyoto. But it would be better if you could stay for at least 8 days, which will allow you to visit all the best highlights of Kansai: Osaka, Kyoto, Nara, Kobe, Himeji, and Hiroshima.