To establish a lawn Zoysia japonica Steud with seeds a win of experiments were conducted for the investigation of seedling root system. The results m summarized m follows; Zoysia japonica and maize elongated mesocotyle in germinating stage. but rye and barley did not. The mesocotyle of Z. japonica seed pushed the elongating coleoptile up throngh the soil, hence could emerge from more deeply planted. The crown roots of Z japonica originated from the coleoptile node. The crown roots of barley originated from the first foliage led node.