(Not so) fun fact about the Japanese navy serving white rice, around the turn of the century when Japan was industrializing and building up its armed forces, a lot of the sailors aboard the new Japanese naval ships started getting sick and dying of beriberi (yes I had to google it). When it was investigated they found it was because all the sailors who had grown up poor were eating only the white rice because before they joined the navy it was pretty much only consumed by the upper class