Below is a guide on the locations of the Toyotama Sashimono Banners in Ghost of Tsushima.
Akashima
Numata Settlement (4 Banners)
All 4 of these banners can be found at Numata Settlement (Mongol Territory).
Kubara
Kishibe Village (4 Banners)
All 4 of these banners can be found at Kishibe Village (Mongol Territory).
Little Monk’s Pond
This banner can be found north of Little Monk’s Pond.
Shimura Cemetery
This banner can be found north of Shimura Cemetery along the river at the base of the waterfall.
Kushi
Black Dye Merchant
This banner can be found on top of the Black Dye Merchant’s cave near Kawamata Village.
Kushi Grasslands
This banner can be found in a small cemetery north of Kushi Grasslands. You will come here during Masako’s tale called The Conspirator.
Otsuna
Fort Imai (4 Banners)
All 4 of these banners can be found at Fort Imai (Mongol Territory).