I am going to explain about Jack the Ripper. Jack the Ripper is a serial killer who has been active in London in 1888. The Ripper killed at least 5 people while 2 month in 1888. Characteristically, those victims are all prostitutes. Also, the Ripper cut victims’ dead body separately. Because of those cruelty and impact, The Ripper became the best-known killer. However, this incident was unsolved even in now. There are many theories of this criminal but no one confirm who is the Ripper. That’s why our group was interested in this case and we try to identify who is the Jack the Ripper. The famousness of the Ripper, there are a lot of games, movies and stories. For example, the Ripper is treated in famous Japanese animation, “Meitantei Conan” and famous comic book “Hagane no renkinjyutsushi” . From these examples, it shows the Ripper’s famousness. Through our studies, we get the conclusion that the ripper is a women. Specifically Riggy Williams. It based on som