Beef Bowl is one of the popular Japanese foods and it's very simple, Beef and Rice! There are very soft, small chunks of beef on rice and the price is very reasonable, starting around 280yen. Yoshinoya (http://www.yoshinoya-dc.com/en/index.html) and Matsuya (http://www.matsuyafoods.co.jp/english/index.html) are two major Gyudon restaurant chains. They have three sizes of Gyudon: Futsuu (Normal), Oomori (Large), and Tokumori (X-Large). Oomori has more rice and Tokumori has more rice and beef. Tokumori is still less than 500yen. Also, you will be amazed how fast they serve it. It won't take longer than 1 minute... usually about 30 seconds! These may be the world's-fastest restaurants!