It's not really a hibaihin since it could be purchased.
But you could only buy it in Namco Namja Town indoor theme park! So, I decided to post it eventually, for information. It is a good thing to know, in my opinion.
ナジャヴの大冒険 : My Favorite NAMJATOWN is a collection of mini games in which the player controls Najavu, an archeologist adventurer who is venturing around the world in search of rare artifacts. You have to complete different mini-games to unlock more and go on new adventures.