In Assassin's Creed: Shadows, Naoe's quest for her father's killers begins with the Golden Teppo. This guide helps you locate Imai Sokyu and the tea merchant.
Imai Sokyu's Location in Assassin's Creed: Shadows

To find Imai Sokyu, remember these clues: he's in western Settsu, specifically southwestern Sakai. If you have scouts, use them to quickly pinpoint his location in Sakai's southwestern area. Otherwise, head to Sakai's Money Changer District. Use L2 to scan; a blue dot will reveal Imai Sokyu's whereabouts.
Following a short sequence, you'll converse with him in a teahouse, gaining crucial information for your next objective.
The Tea Merchant's Location in Assassin's Creed: Shadows
Finding the tea merchant is straightforward. They're near Imai Sokyu, in Sakai's northern area. Again, use L2 to scan and locate the blue dot indicating their position.
This encounter teaches Naoe the tea ceremony, bringing you closer to obtaining the Golden Teppo.
This completes your guide to finding Imai Sokyu and the tea merchant in Assassin's Creed: Shadows. For more Assassin's Creed: Shadows tips and tricks, including difficulty settings and information on romancing Katsuhime, check out The Escapist.