Four new factions arise in a divided 19th century Japan. We are of course talking of the Faction Pack DLCs now available through Steam for the Total War: Shogun 2 - Fall of the Samurai expansion.
Saga Faction Pack
Centuries of trade with outsiders has given the people of Saga an understanding of foreign and modern ways, allowing them to adopt new military technology quickly.
Obama Faction Pack
With long experience of government and administration, the authoritarian people of Obama are unsurpassed in controlling people and trade.
Tsu Faction Pack
Rising from humble roots, the people of Tsu are wise, artful and astute strategists. Their use of Ninja is unsurpassed on the battlefield and in covert operations.
Sendai Faction Pack
Fiercely loyal to the incumbent Tokugawa Shogunate, the noble people of Sendai endured the ages of turmoil to emerge as respected tacticians and sublime diplomats.
More powder and edges to be brought to the historical struggle between traditional Samurai culture and western influences.