The Supreme Court on Monday finalized the death penalty of Tomohiro Kato for the vehicular homicide and stabbing spree that left seven people dead and 10 injured on the streets of Tokyo's Akihabara neighborhood in 2008.

The indiscriminate killing spree was carried out based on Kato's "meticulous preparation" and "determined intent of murder," Chief Justice Ryuko Sakurai said.

"The incident also had huge repercussions on society and the victims' kin are keenly desirous of his punishment," she continued, condemning the 32-year-old former temp worker as liable for "extremely grave criminal responsibility" and worthy of no extenuating circumstances.