Tekkamaki came into being out of an idea of developing food which a gambler could easily eat while gambling (same as in the case of sandwich which came into being out of the idea that Earl of Sandwich in England wanted to develop food which he could eat easily while playing his favorite card games).
博打をしながら片手間に簡単に食べられるものはないかと言う発想から生まれた（イギリスのサンドウィッチ伯が大好きなトランプゲームをしながら手軽に食べられる物はないかという発想で生まれたサンドウィッチと発想は同じ）。