There is an anecdote that uses a word play, in which tekka-maki (literally means rolled tekka or tuna sushi roll) was a preferred food for good luck because it could be eaten as a simple meal between gambling matches.
験（げん）を担いで、または鉄火という言葉を掛けた洒落として、博打の合間には、手軽に食べられる簡易食の、「鉄火巻」が好まれたという逸話もある。