However, 207 sheets of the Ino large maps (169 sheets of which were colorless) were discovered at Library of Congress in the United States in March 2001.
ところが、平成13年（2001年）3月にアメリカ合衆国議会図書館で、伊能大図のうちの207枚（うち169枚が彩色なし）が発見された。