Spy Game A.d. 1600 summary:

A battle between modern-day spies and Edo Period shinobi begins!"Predator" is an intelligence agency organized in modern Japan.Ichinami and Sankai, members of the organization, are ordered to retrieve a small nuclear weapon. However, during their mission, they're suddenly enveloped in a blinding light.The next thing they know, they find themselves in a completely different landscape than the one they were in before. It's the Edo Period. The two of them had traveled back in time with a small core!The person behind the time slip was Ieyasu Tokugawa. He was planning to conquer the world and obtain the small core. This is where the story begins.A battle between modern Japanese spies and a ninja army led by Ieyasu's vassal, Hattori Hanzo. Don't miss this covert battle that transcends time and space!(Source: Amazon Japan)