Imjinjangcho is a dreaft of a report to King Seonjo which Admiral Yi wrote accurately and in detail about the whole military affairs during his service as Commander of the Jeolla Left Naval Station and Supreme Naval Commander of the Three Procinces, the is, from 1 April 1592 to 10 January 1594, for example, how things were going in battles, movements of the enemy, proposals concerning military matters and situations of vigilance and preparatioins for battles. This was designated as National Treasure No. 76. on 23 January 1595(46cm × 33.5cm)