There is a free observation deck on the 24th floor of the building. Scenery seen from observatory was good. There is a cafeteria and observation deck where you can relax.
You can enjoy both mountain and sea views for free! The staff is also friendly and there is a cafeteria (a little expensive tho) and a bathroom.
The only bad this is that it was too hot.
There is an elevator dedicate to reach the observatory at the 23th floor.
Totally recommended, not very crowded.
Would love to come back soon
The Kobe City Hall Observation Lobby is free and opens until 10 p.m. Low crowd level and has washrooms. About a 15-min walk from the JR Sannomiya Station. You can catch both the ocean view and the mountain view from here. Also offers free Wi-Fi too. They also have a couple of restaurants / cafés on the same floor.