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Yasama is a technology in Age of Empires II: The Forgotten that is unique to the Japanese and can be researched at the Castle. Once researched, it makes towers fire two extra arrows.


Yasama essentially lets Japanese towers act as miniature Castles. As it is available in the Castle Age, it can be used to follow up a tower rush, as these involve flooding the enemy base with towers in the Feudal Age. It is also an excellent defensive technology. Combined with the other Japanese unique technology Kataparuto, which allows Trebuchets to pack and fire faster, it makes for a powerful defensive combination. Trebuchets are already a great defensive tool in the shelter of a Castle, but adding in several towers can make a huge difference. They can even be used without Castles, although it is still significantly less painful (and far faster) to swarm a tower than to swarm a Castle.


The Forgotten[]

  • Yasama costs 300F/400W.
  • Yasama gives Towers 3 additional arrows.

The African Kingdoms[]

  • Yasama now costs 300F/300W.
  • With patch 4.8, Yasama gives Towers 2 additional arrows.


  • As a compound of ya (arrow) + sama (arrowslit), the word is usually written and pronounced as yazama according to the rendaku euphonic rule.


Yasama is the name given to arrowslits in Japanese castles. Incidentally, Arrowslits is the name of a separate technology introduced in The African Kingdoms. Unlike medieval castle arrow slits, which were slim holes in the wall and offered little flexibility in the type of projectile weapons that could be used to defend the castle, Yasama slits were known to be more flexible in design, and innovations in Japanese fortification led to the development for not only arrows, but also for gunpowder and cannons once they were introduced to Japan during the Sengoku era.