A new type of low-NOx burner was studied for application to a regenerative burner system in an industrial furnace. The fuel is separately injected at an angle to the axis of the air stream. As a result, mixing of fuel and air is suppressed at the initial stage of combustion, and combustion progresses gently. Consequently, very uniform combustion is obtained, self-recirculation of the hue gas is achieved, and emission of NOx is considerably reduced, along with a decrease in the quantity of soot produced. The experiments were conducted under the conditions of preheated air temperature of 1100 degrees C and a furnace temperature of 1000-1340 degrees C. NOx emission from the low-NOx burner is under 50 ppm corrected to 11% excess O-2. A regenerative burner system with this new type of low-NOx burner was applied to a heavy forge furnace. It was confirmed that the low NOx burner meets Japanese environmental regulations. The energy saving was 55%.