Complex sentence: Her name was Shin Tanokura (田倉 〈 たのくら 〉 しん), but she was called "Oshin", which is Japanese archaic cognomen.
Split into simpler sentences: Her name was Shin Tanokura (田倉 〈 たのくら 〉 しん). But she was called "Oshin", which is Japanese archaic cognomen.