This is a commemorative card for completing the "Mystery Solving Town Walk" event jointly held by Kita-Osaka Kyuko Railway and Osaka Monorail. It was created to commemorate the 50th anniversary of the opening of Kita-Osaka Kyuko Railway and the 30th anniversary of the opening of Osaka Monorail. It is a commemorative item for participants who completed the event held in 2020. It opens like a pop-up book. Made of paper. Size when closed: 20cm x 15cm.