Flesh and Stone is an Act 2 side tale in Kushi, Toyotama, where the son of the sculptor Master Izo asks you to recover his father's tools so he can repair a ruined statue. It pays a Charm of Immunity.
Part 43 of 66 in Tales of Tsushima
A rumor says Mongols are smashing Master Izo's statues. In Kushi, look for the famous statue, where his son is working on the broken pieces.
A man chiseling by a smashed statue tells you to keep away until he sees you are not a Mongol. The statue was his father's, and he says the Mongols killed Master Izo. His chisels and gear sit in his father's old home, which Mongols now occupy. Jin offers to fetch them.
Find the sculptor's home and kill the Mongols there. Search for the tools, then rescue the sculptor. Lead him back to the broken statue, defeat the Mongols waiting there and speak to him.
Master Izo is alive. A Mongol general admired his work and spared him to carve a statue of Kublai Khan, and he does not want to leave. Jin makes him come. Back at the statue, Izo finds his son killed defending it. He later restores it and calls it his best work. Revisit and Izo says the slow work reminds him of better days. His son always rated the statue as his finest. Once it is whole again, Izo finally agrees.
The Way of the Bow
The Way of the Bow is Ishikawa Tale 4 of 9, the last Act 1 part of his storyline, where you defend Hiyoshi Springs from Tomoe's attack. It is worth doing early because it gives you the Flaming Arrow, plus the Charm of Immunity and the Storming Falcon vanity gear for your half bow.
A Debt Repaid
A Debt Repaid is an Act 2 side tale in Kushi, Toyotama, where you help a man named Gomyo take revenge on the bandits who used him. Expect a camp assault and a second wave, and a Charm of Enduring Affliction at the end.
A Final Request
A Final Request is a Toyotama side tale that starts with Straw Hat ronin raiding Lucky Genzo's Inn. You chase the raiders through three camps to find a captured man named Oda, and the reward is a Charm of Dual Destruction II.
A Thief of Innocence
A Thief of Innocence is an Act 2 tale in Umugi Cove where a mother asks you to find her missing daughter, Kuma. You question locals, trail a strange Straw Hat and raid an inn, and the reward is a Charm of Ferocity.