We analyzed P-wave coda from a deterministic point of view. A temporary observation of local earthquakes using a small aperture seismic array at Atagawa in the Izu Peninsula was carried out in order to determine the structure of scatterers near the array. The array system consisted of 10 seismic stations and the dimension was 125m×100m. The small aperture array observation was found to be useful to identify and locate scatterers near the array. Directions and magnitudes of slowness vectors of incoming waves across the array were determined from P-wave coda of 5 local earthquakes by using the semblance analysis. The analysis revealed that the early P-wave coda waves for 2s from an onset of the P-wave arrived from the same direction and had the same apparent velocity independent of a source direction. This result indicated that the coda waves come from the local Scatterer which was located about 4km north of the array and was 3km in depth. We interpreted that the scatterer corresponded to inhomogeneity of velocity distribution due to geothermal activity or faulting in the crust. Since the resolution of the scatterer's location is, however, 3km or more, an alternative origin of the coda wave is topographical irregularities such as a valley.