After Kurusu is stabbed, Takuru infiltrates AH Tokyo General Hospital, hoping to find the creator of the sumo stickers.  When he gets there, he, Onoe, and Itou are forced to hide in the basement to avoid being spotted.  Inside the basement's autopsy room, they find a secret entrance that leads to an underground laboratory where terrible experiments were once conducted.  Takuru thinks he's been here before...
and was first used in an experiment, in 2007.
واستُخدِم لأوّل مرّة في تجربة في عام 2007
als es zum ersten Mal während eines
Experiments im Jahre 2007 gezeigt wurde.
remonte à l’année 2007.
ritenendo che avesse effetti
di qualche tipo, nel 2007.
e que começou a ser usada em
 experimentos desde então.