Thank you for playing the game! The storage chest found throughout the game can help to clear up inventory space and allow for strategic planning for your future adventures.
Have you used the Teleport Stone? Uncle George in Kurio Ledge will give you one. It can be charged up by slaying monsters and at 100 spirit essence, allows you to create a portal between current location and the kingdom storage chest. The portal will close after re-entry or a minute after being opened.