F. Nakamura and M. Umemura : "On the Mass of Population III Stars ", Astrophysical Journal, 515, 239-248 , 1999
T. Kitayama, Y. Tajiri, M. Umemura, H. Susa, and S. Ikeuchi : "Radiation-Hydrodynamical Collapse of Pregalactic Clouds within Ultraviolet Background ", Mon. Not. Roy. Astron. Soc. Letters, 315, L1-L7 , 2000
H. Susa and M. Umemura : "Formation of Primordial Galaxies under Ultraviolet Background Radiation ", Astrophysical Journal, 537, 578-588 , 2000
H. Susa and M. Umemura : "Ultaraviolet-Background-Induced Bifurcation of the Galactic Morphology ", Mon. Not. Roy. Astron. Soc. Letters, 316, L17-L20 , 2000
T. Nakamoto, M. Umemura, and H. Susa : "The Effects of Radiative Transfer on the Reionization of an Inhomogeneous Universe", Mon. Not. Roy. Astron. Soc., 321, 593-604 , 2001
F. Nakamura and M. Umemura : "On the Initial Mass Function of Population III Stars ", Astrophysical Journal, 548, 19-31 , 2001
T. Kitayama, H. Susa, M. Umemura, and S. Ikeuchi : "Criteria for the Formation of Population III Objects in the Ultraviolet Background Radiation ", Mon. Not. Roy. Astron. Soc., 326, 1353-1366 , 2001
F. Nakamura and M. Umemura : "The Stellar Initial Mass Function in Primordial Galaxies ", Astrophysical Journal, 569, 549-557 , 2002
H. Susa and M. Umemura
: "Formation of Dwarf Galaxies during the Cosmic Reionization
", Astrophysical Journal, 600, 1-16
,
, 2004
H. Susa and M. Umemura
: "Effects of Early Cosmic Reionization on the Substructure Problem in Galactic Halos
", Astrophysical Journal Letters, 610, L5-L8
,
, 2004
M. Mori, M. Umemura, and A. Ferrara
: "The Nature of Ly$\alpha$ Blobs: Supernova-Dominated Primordial Galaxies
", Astrophysical Journal Letters, 613, L97-L100
,
, 2004
T. Kitayama, N. Yoshida, H. Susa, and M. Umemura
: "The Structure and Evolution of Early Cosmological HII Regions
", Astrophysical Journal, 613, 631-645
,
, 2004
K. Saigo, T. Matsumoto, and M. Umemura
: "Formation of Population III Binaries
", Astrophysical Journal Letters, 615, L65-L68
,
, 2004
T. Murakami, D. Yonetoku, M. Umemura, T. Matsubayashi, and R. Yamazaki
: "The Reionization History and Early Metal Enrichment inferred from the Gamma-Ray Burst Rate
", Astrophysical Journal Letters, 625, L13-L16
,
, 2005