In Nancy Drew: Shadow at the Water’s Edge, you will need to snoop the guest rooms. You can do this once you solved the light lock puzzle behind Miwako’s desk and get the room for rooms ending in 8/9, and also when you get the collar for Suki and give it to Rentaro. He will leave with the collar and the magnetic star key card will be available at his workstation.
Choose any hallway and go all the way down to the end. On either side, left or right, the doors will end in an 8 or 9. Use your 8/9 key to unlock the door and enter the guest room. The use your magnetic star key card on the matching symbol on the wall. A sliding panel will open up and you can explore each room on that level and side of the hallway.
