- −15% Land attrition
- +1 Land leader maneuver
- +20% Fort defense
- +10% Goods produced modifier
- +15% Provincial trade power modifier
- +1 Yearly prestige
- +1 Attrition for enemies
- +2 Tolerance of the true faith
- +10% Infantry combat ability
- +15% National manpower modifier
Ainu starts as a tribe in the North Japanese archipelago with the Japanese daimyos during the Sengoku period (戦国時代 Sengoku Jidai).
Since Ashikaga at early game owns all of domains as their daimyo, it's not easy to expand southward. But fortunately, Ainu also starts with a Yeren's province that has Ainu culture & animist religion, Kamchatka.
Yeren is more likely to ally with or under Oirat, which is in early game will at war against Ming. If Yeren go to war against Ming,attack them and occupy Kamchatka & several coastal provinces of Yeren.Also if their armies isn't present because fighting in Oirat lands, try to seize their capital to got more war score. But always avoid fight their armies, since Ainu is a tribe that unlikely have enough army to fight Yeren. If they willing to accept any peace agreements, take Kamchatka & some coastal province. It's also important to get some money from them. It's necessary to end the war before Ming ends their war against Oirat & Yeren.
After that, ally with Korea if they willing to because they will help further expansion and starts spying Yeren again. Always wait until Yeren go to war against another country, then declare war against them until it's possible to full annex Yeren. It's also important to core all provinces before go to the next war, and set higher autonomy on Manchuria region provinces instead of converting their religion because it will costs so much money and Tengri isn't a good religion if became Ainu's state religion.
At this point after having some province in Manchuria, sell any province that accepted by Ming and then became their tributary. This is because Jianzhou is tributary under Ming and not became their tributary then declares war against them will cause Ming called into the war. After became tributary under Ming, starts build spy networks on Jianzhou and then go to the war. Don't forget to call Korea and they are likely join the war because usually they are rival.
Avoid any fight against their army & try to seize province as fast as possible. Repeat this until Korea & Ainu bordering each other. They will broke alliance soon but try to still improve relationship with them to prevent future war. At this point, expansion on Manchuria region should be stopped for a while.
If there are any big or strong domain in Japanese archipelago that doesn't under Ashikaga, improve relationship with them and starts building spy network on Ando.After having some province in southward, spawn the rebels of Shinto zealots then convert to Shinto so there is no need to worry about further expansion to southward.This is because Japanese's province usually have high developments and very expensive to convert.