noun
Okinawan pork offal soup
A specialty of Okinawa Prefecture; a clear soup made with pork offal (intestines, stomach, etc.), often served at celebratory occasions.
沖縄の正月には、中身汁を食べる家庭が多い。
Many families in Okinawa eat nakami-jiru during the New Year.
中身汁は豚の内臓を使った澄まし汁だ。
Nakami-jiru is a clear soup made with pork offal.
中身 means 'contents' or 'filling'; 中身汁 literally means 'contents soup', referring to the offal inside.
From 中身 (nakami, 'contents') + 汁 (shiru, 'soup'), referring to the pork offal used as the main ingredient.