Your father was named Yoshimune.it seems that the whole ship ended up sinking.I've seen a similar surname spelled as "master of the village", so it might be a version of that, but...
That's only a guess.—the daughter of an important person.A ruler, a provincial governor.However, there is nothing left in the clan records....Yes, something happened to them.I tried asking, but the new governor wouldn't tell me anything either.Only the common people on the island remembered the name "Murasa".They told me it was a secret, but agreed to give me the names of the deceased.It was very kind of them to accept me, even though I represented a foreign faith.I don't know what kanji were used for "Murasa".You were probably thinking that the ship would one day come and rescue you, butAlso, the name of Murasa-san may have been famous among the islanders...