Is this too much for one day?

Day 2: OSAKA

  • Go to Osaka castle after waking up
  • Dotonbori
  • Namba
  • Skinskei and Tsutenkaku tower
  • Abeno Q’s Mall
  • Eat something nice

EDIT:

I've made some changes to my itinerary and have took your suggestions and I've split the day in half while adding other things. Is this still too much?

Day 2: OSAKA

  • Go to Osaka castle after waking up
  • Amemura
  • Dotonbori
  • Eat in dotonbori
  • Namba
  • Head back to my BnB

Day 3: OSAKA

  • Osaka’s Aquarium KAIYUKAN
  • G-Lion Museum
  • Shinsekai
  • Abeno Q’s Mall
  • Head back to my BnB, wash and dry clothes, and pack up my things