Welcome to ΣStar

ΣStar : Sigma Star accumulates, preserves and offers access to digital academic resources consisting of research results and educational materials created by both the Faculty and the Graduate School of Science and Technology of Keio University. Σstar is established and supported by the Information and Media Center for Science and Technology. For more details on contents, please read About ΣStar (Sigma Star).


  • All articles and materials of ΣStar are accessed under the stated permission of their authors or originators.
  • The copyright for each resource belongs to its author or publisher as designated. For use, abide by the appropriate copyright law.
  • Some resources are only available at the Science and Technology (Yagami) Campus.