Total War: Shogun 2 - Otomo Clan DLC Trailer

As pioneers of gunpowder in Japan, the Otomo bring that renowned expertise to the battlefield. The Otomo introduce four new land units and a new naval unit. Leased land (one building slot per city) provides a core injection of wealth if traded to the Portuguese, and a new building subchain brings the Hospital, Jesuit Seminary and Jesuit College to your campaign to provide major bonuses to the spread of Christianity.
One of the major clans of the lands of Kyushu, the Otomo were among the first to make contact with the Europeans -- regularly trading with the Portuguese, and eventually converting to the Christian faith.