Complex sentence: Adyernamed Moemon (茂右衛門), who happened to pass by, took pity on Kinchō and gave the people of Higaino some money to save Kinchō.
Split into simpler sentences: Adyernamed Moemon (茂右衛門), who happened to pass by, pitied Kinchō. He gave the people of Higaino some money in order to save Kinchō.