Kashima Reiko was a girl who was abused by a pair of boys and got ran over by a train in the Meishin express way. It's a Japanese urban legend. A lot of people have an opinion that if Ты read this story, you'll see her within a month.
It started out while she tried to proceed onto the train because she was going to travel onto another place when all of the sudden, a pair of boys came to her and started abusing her in a really bad way. When it was over, she was crawling onto a railway and a train ran over her since it was impossible for her to get up. She was cut slit open between the belly. So, if Ты see her, she'll ask Ты questions. For example, she'll ask Ты on where her legs are. If Ты answer it correctly, she'll ask Ты about whoever told Ты about this. She won't only ask these kind of questions, she'll also ask Ты trick questions. It'll be a Болталка Вопрос so Ты have to pick a choice wisely.
So, that's all I could really explain to Ты about Kashima Reiko.