The Sakurai Clan is a world famous Japanese clan of blacksmiths.
During World War II Musashi Sakurai was tasked by Heinrich Himmler to create a replica of the Spear of Longinus. While Musashi was able to create an inferior copy using the god-steel Hihi'irokane, he also unintentionally cursed his clan to be forced to weild the weapon, becoming the first Tubal Cain.