For this reason, they were called 'pawns at a high price' (a highly risky pawn), which is considered to be the origin of the word 'kojichi' ("ko" indicates "high" and "jichi (shichi)" indicates "pawn" in Chinese characters).
このため、「高値の質物」（リスクが高い質物）と言われ、それが「高質」の語源とも言われている。