1. ?東太???? / HEADWATERS OF THE TONE RIVER 2. ??? ?壱 / ENVIRONMENTAL SOUNDS AT EROSION CONTROL WEIR 3. ?東太???????? / FLOW OF THE TONE RIVER 4. ??? ?弐 / UNDERWATER SOUNDS AT TONE CANAL 5. ?東太?????? / ESTUARY OF THE TONE RIVER 6. ??? ?? / ENVIRONMENTAL SOUNDS AT BENCHMARK STONE