A 19-year-old female student of Nagoya University, Japan, who confessed to killing a 77-year-old woman, Tomoko Mori, last month has told police that she felt fulfilled after the killing.

Japan Times reports that the student(names withheld) was arrested on Tuesday for killing Mori with a hatchet on the 7th of December, 2014.

The Aichi Prefectural Police on Friday said the student used her phone to take pictures of the victim's corpse.

During investigations, police found Mori’s body in the student's house at Nagoya-shi, the largest city in the Chūbu region of Japan.

The suspect told investigators that she felt 'fulfilled' after killing Mori because she had owned the hatchet since she was in Junior Secondary School and had always wanted to kill someone.

She also revealed that she had once poisoned her classmates while studying at a private high school in Miyagi Prefecture.

The victim did not die but lost his sight permanently.

Investigations have revealed that Mori met her killer at a religious gathering on the same day she is believed to have died.

According to a member of the religious group, the student left the venue with Mori who was trying to persuade her to join them.

The suspect however told police that she was annoyed by the deceased who tried to convert her.

Investigations led officers to her apartment where they found the deceased’s corpse.