Hero of Tsushima is a Sword Kit that comes with the Hero of Tsushima Armor bonus. Owners of the right edition get it once the Prologue is done, and it only changes how your blades look.
Own one of the editions that carries the Hero of Tsushima Armor bonus, then play through the Prologue. The kit becomes available as Act 1 begins, with no shop or search needed.
It matches the golden Hero of Tsushima mask and helmet if you want the full set.
Image: Sucker Punch Productions / PlayStationAzure Dragon
Azure Dragon is a Sword Kit that reskins Jin's katana and tanto. You collect it from the Pillar of Honor on the east side of the Endless Forest in Kamiagata, and it is purely cosmetic.
Bishamon's Fortune
Bishamon's Fortune is a Sword Kit that reskins Jin's katana and tanto. You collect it from the Pillar of Honor just north of Little Monk's Pond in Toyotama, and it is purely cosmetic.
Breath of Hachiman
Breath of Hachiman is a Sword Kit that reskins Jin's katana and tanto. You collect it from the Pillar of Honor between Old Kanazawa Marsh and Iijima Farmstead in Toyotama, and it is purely cosmetic.
Dueling Festival
Dueling Festival is a Sword Kit that reskins Jin's katana and tanto. You collect it from the Pillar of Honor east of Fort Ito, out in the Old Togo Rice Fields in Toyotama, and it is purely cosmetic.