An experiential puzzle-solving event "Railway Detectives and 8 Suspects" will be held from January 14th to March 12th, going around the Keio Line, Inokashira Line, and Toei Subway to collect clues. The third installment of the "Railway Detective Series" that was held twice last year.

The purpose of this time is to find out the criminal who stole the "secret diamond". The entire area along each line will be treated as one area, and the survey will be conducted in order from Chapter 1 published in the special booklet. The story is prepared up to Chapter 3.

Answers are given on the smartphone site that can be accessed from the QR code in the booklet, and if the answer is correct, you will receive a clear keyword that proves that you have cleared the chapter. If you fill in the clear keywords and necessary items for each chapter on the special site and apply, you will receive a wonderful prize by lottery.


The booklet is distributed at each station on the Keio Line and Inokashira Line, each station on the Toei Subway (excluding Oshiage, Meguro, Shirokanedai, and Shirokane Takanawa), Nippori-Toneri Liner "Nippori Station" and "Nishi-Nippori Station". The number of copies distributed is 50,000, and it will end as soon as it runs out. Participants are responsible for the necessary transportation expenses.