Hakoniwa General Hospital (箱庭病院, Hakoniwa Byouin) is a hospital affiliated with the Flask Plan. The hospital studied atypical children and tested to see what their exceptional abilities were best suited for.
It is unknown how long the hospital was operational, but it had already been established thirteen years prior to the start of the series. The hospital was affiliated with the Flask Plan, though what role it played exactly is unknown. Roughly ten years prior to the start of the series, the hospital was reduced to rubble by its last two patients, Shibuki Shibushi and Gagamaru Chougasaki. The hospital is later rebuilt, one of its new focuses being regenerative medicine.
The hospital was divided into seven wards: the First Abnormal Ward, the Second Abnormal Ward, the Third Abnormal Ward, the Abnormal Pediatric Ward, the Extreme Abnormal Ward, the Abnormality Studies Ward, and the Abnormality Analysis Ward.