Search for Matter/Antimatter in Early Universe

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Based on the experimence integrated in previous years, the superconducting spectrometer, BESS,has been up-graded specially in particle identification in an energy range of < 1 GeV.The balloon flight using the BESS spectrometer, in JFY 1995, was carried out in north Canada for a duration between June-August, 1995. Ten participants were deligated with support of this grant. As a scientific result, about forty low energy cosmic-ray antiprotons was observed in the scientific balloon flight on July 25-26,1995, and the first cosmic-ray antiproton observation in the previous years have been well verified with > 40 antiproton obserbation, this year. Antiparticle search in cosmic-ray has been progressed with a sensitivity down to 2*10^<-6> in antihelium/helium ratio.These results have been published in Physical Review Letters and was presented in the Internaional cosmic-Ray Conference, in 1995, in very high evaluation in this field.