This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
Benkei and Ushiwakamaru fought at Kiyomizu Temple.
A person who is arrogant at home but submissive outside the home is called an "uchi-benkei".
The shin is known as "Benkei's weeping spot" because, if you hit it, it hurts so much that even someone as strong as Benkei would shed tears.