Particularly, 4 shiitake levels, 0, 0.4, 0.8 and 1.2% were added to the meat batter of treatment 1(T1, control), treatment 2(T2), treatment 3(T3) and treatment 4(T4), respectively. For the treatment 5(T5), it was added with 100 ppm NaNO2 (without shiitake).