http://swrc.ontoware.org/ontology#Article Infrasound observation at Japanese Antarctic Station "Syowa": 11 years observations and results en Infrasound Syowa Station Infrasound observation at Syowa Station (SYO), Antarctica started as one of the projects related to International Polar Year (IPY2007–2008) as one-sensor pilot observation, and after the pilot observation, we then migrate to 3-sensor arrayed observation. The obtained 11 years of infrasound data enable us to examine characteristics of infrasound behavior around SYO. Spectral analysis of recorded data clearly shows continuous arrivals of microbaroms from the southern ocean and weak annual change of the energy. Array analysis of the 3-sensor observation data detected infrasound signals generated by ice-related activities around SYO. Polar Data Journal 4 45-54 2020-03 National Institute of Polar Research 2432-6771 https://doi.org/10.17592/001.2019070501|Original Data Atmospheric science/Climatology Solid earth geophysics/Seismology