A Sad One

Sasaki Sadako was a young girl who believed in the popular legend that folding 1000 paper cranes would grant her a wish. Her only wish was to be cured of her leukaemia. However, it is popularly believed that she fell short, having folded 644 before she died and that her friends folded the rest and buried them along with her. Inspired by her story, to this day, children all over the world fold paper cranes and send it to her memorial. Where is her memorial located?