Want to Open the Safe Escape

Harekore - Escape Game: I Want to Open the Safe Escape is another Japanese point and click room escape game developed by Harekore . In this Safe Escape game, I've arrived at the client's mansion to open a safe that's been locked for ages. I've worked as a locksmith for many years and opened all kinds of locks, but I've never seen this type of lock before. I don't know how to open it, and this is a very bad situation. The client says that a family heirloom passed down through generations is inside, but it hasn't been opened for generations. This isn't getting me anywhere, so I'll search the room for any clues. I'll solve the mysteries hidden throughout the mansion and successfully open the locked safe!