Sengoku get handcannoneers in castle age. Ottomans also get handcannoneers in castle age. The Janissary does bonus damage against all sorts of cavalry while the Ashigaru handcannoneers from Sengoku only do bonus damage against heavy units like a crossbow unit.

Yari get bonus damage against the Mehter, making it easy to snipe.

You can put your Yatai out and collect the food before the Sipahi become a problem.

You don't really want to be investing in Yumi when you're going to be dealing with Sipahi who are going to be absolutely everywhere.

You could maybe go Yari cavalry here as Sengoku. But to actually start beating it you will need that second tier Daimyo estate and the upgrade, which is over 900 resources of investment in the Feudal Age.