Who is Sanjo from Deep River and what is their importance?

Sanjō is a photographer who travels with the Japanese tourists. He is on his honeymoon with his wife. Sanjō is only interested in taking unique photographs that will make a name for himself, and at the end of the novel, he tries to sneak a forbidden photo of the funerals at the River Ganges. Though Sanjō shows no respect for the people Ōtsu has spent his life helping, Ōtsu tries to defend Sanjō and is beaten to near death in his stead.