When Minamoto no Yoshitsune came back to Kamakura after defeating the Heike, he couldn’t enter Kamakura, because he was touched by anger in his brother Yoritomo. Yoshitsune stayed Manpuku-ji at Koshigoe. It is famous for the place where Yoshitsune wrote a petition called Koshigoe-joe here.
A draft of Koshigoe-jo that Benkei wrote is on display in the main hall. However, whether really he wrote a petition is doubtful.
More importantly, many Kamakura-bori (Kamakura carvings) are on display in the Hon-do (main hall) and Kori.