Traditionally, Japanese warriors brought back the heads of enemies slain on the battlefield as proof of their deeds. Nose collection in lieu of heads became a feature of the second Korean invasion. Originally, remuneration was paid to soldiers by their "daimyō" commanders based on the severed heads upon submission to collection stations, where inspectors meticulously counted, recorded, salted and packed the heads bound for Japan. However, because of the number of civilians killed along with soldiers, and crowded conditions on the ships that transported troops, it was far easier to just bring back noses instead of whole heads. Hideyoshi was especially insistent upon receiving noses of people his samurai had killed as proof that his men really were killing people in Korea.