The kanji tell the story. 義 (gi) places a sheep (羊), symbol of virtue and sacrifice, above a serrated blade (我): the idea of what is proper and just. 理 (ri) shows the natural grain lines on polished jade (玉): the logic, the underlying pattern of things. Together: doing what's right because there's an order to how people should treat each other. 義理を通す (giri o tōsu) - "to see your duty through, even at your own expense. " This is one of 32,500+ words on learn.japanology.nl.