Research conducted by Tadanobu Tsunoda on auditory and visual sensation, designed to test and understand the functions of the cerebral hemispheres, is discussed. Tsunoda discovered that the Japanese responses to sounds by the left and the right sides of the brain are very different from the responses obtained from people from other countries. His tests show that a Japanese left cerebral hemisphere receives a wide range of sounds: linguistics sounds (vowel and consonant sounds); and nonlinguistic sounds, including cries, emotional utterances, traditional Japanese musical instruments, sounds of wind, waves, and creeks. In comparison, the range of sounds received by the left hemisphere of people from western countries is narrower, apparently limited to syllables made up of consonant and vowel sounds. On the other hand, the right hemisphere of a Japanese receives a very limited amount of artificial or man-made sounds: mechanical sounds, Western musical instruments, and noise. Japanese living outside of Japan where Western languages are spoken do not show the typical Japanese pattern after the second or third generation. However, the children of Americans or Koreans who are exposed from their birth to a complete Japanese environment have the Japanese brain functioning system. It appears that the uniqueness of the Japanese brain functions comes from the influences of the environment (SW)