Senkawa is a character from the third episode of Shigofumi.
He is a friend of Kaname Nojima and Touru Kotake and is fairly sociable and popular amongst his classmates. In the opening of episode 3, Tooru Kotake ask Senkawa and Kaname if they have ever thought about jumping in front of a train. Both of them say no, but later that evening Senkawa takes his own life by jumping from his apartment building.
Later it is revealed via a shigofumi that Senkawa had often thought about jumping. He did not wish to die, although he states that he didn't particularly want to live either, he just wanted to experience jumping. He tells his friends that there was no real cause for his suicide and that this was simply a mood he was in.