ドリフターズ [Drifters] is a 7-book series with 7 primary works first released in 2010 with contributions by Kohta Hirano.
Shimazu Toyohisa, the strongest samurai of the Sengoku period, gets lost in another world during the Battle of Sekigahara! Together with Oda Nobunaga and Nasu Yoichi, whom he meets there, he begins a quest to conquer the country with the pride of the samurai at stake! The strongest action fantasy in history, featuring heroes from history!