1. “A Note on Geodesics in the  Hayward Metric”, Chiba and M. Kimura, Prog. Theor. Exp. Phys. ,査読有, (2017) 043E01, doi:10.1093/ptep/ptx037


  1. Planck constraints on scalar-tensor cosmology and the variation of the gravitational constant”, J. Ooba, Ichiki, K., Chiba and N. Sugiyama, Phys. Rev., 査読有, D93, no. 12, 122002 (2016), doi:10.1103/PhysRevD.93.122002
  2. Multi-Sightline Observation of Narrow Absorption Lines in Lensed Quasar SDSS J1029+2623”, Misawa, C. Saez, J. C. Charlton, M. Eracleous, G. Chartas, F. E. Bauer, N. Inada, H. Uchiyama, The Astrophysical Journal, 査読有, 825, (2016), article-id 25, doi: 10.3847/0004-637X/825/1/25


  1. “Reconstructing the inflation potential from the spectral index, Chiba, PTEP, 査読有, 7, 1-10, (2015), doi: 10.1093/ptep/ptv090