Delta Air Lines Has a Japanese Knife Problem 2.75K Hamilton Nolan 11/09/10 09:29AM Filed to: the friendly skies the friendly skies Delta Knives Terror trendwatch Japan Authorities are interviewing all passengers on a Delta flight to Japan after a knife was found under one of its seats. Last week, box cutter blades were found aboard a Delta flight from Japan to the U.S. Stop it, Japan.