These weapons proved to be ineffective, as Jakotsu was able to easily slaughter all of the soldiers. They used matchlock guns in an attempt to throw him off guard since they were made before Jakotsu's revival. Soon after Kyōkotsu's death, Jakotsu is confronted by many soldiers that were tasked with executing the specters of the Shichinintai. Jakotsu learned from Kohaku that Kyōkotsu was killed at the hands of Kōga he commented on how Kyōkotsu was the weakest among his comrades.
Fifteen years later, Jakotsu and the other Shichinintai members were revived when Naraku gave Bankotsu seven Sacred Jewel shards so they would destroy all of his enemies for him. They were then captured and executed soon after. One day, they took a job for a lord, only to be betrayed and forced into the snowy mountain. Soon they were joined by five other individuals to become the 'Shichinintai.' Their mercenary skills soon became feared far across the land.
Jakotsu was a very close friend of Bankotsu and they traveled together long before becoming mercenaries.