Urschitz J, Kawasumi M, Owens J, Morozumi K, Yamashiro H, Stoytchev I, Marh J, Dee JA, Kawamoto K, Coates CJ, Kaminski JM, Pelczar P, Yanagimachi R, Moisyadi S.

Helper-independent piggyBac plasmids for gene delivery approaches: strategies for avoiding potential genotoxic effects.
Proc Natl Acad Sci U S A. 2010 May 4;107(18):8117-22. Epub 2010 Apr 19

Combelles CM, Morozumi K, Yanagimachi R, Zhu L, Fox JH, Racowsky C.

Diagnosing cellular defects in an unexplained case of total fertilization failure.
Hum Reprod. 2010 Jul;25(7):1666-71. Epub 2010 May 15

Wei Yan, Kazuto Morozumi, Jie Zhang, Seungil Ro, Chanjae Park, Ryuzo Yanagimachi

Birth of Mice after Intracytoplasmic Injection of Single Purified Sperm Nuclei and Detection of Messenger RNAs and MicroRNAs in the Sperm Nuclei
Biol Reprod. 2008 May;78(5):896-902. Epub 2008 Feb 6.

Huili Zheng, Clifford J. Stratton, Kazuto Morozumi, Jingling Jin, Ryuzo Yanagimachi, Wei Yan

Lack of Spem1 causes aberrant cytoplasm removal, sperm deformation and male infertility
Proc Natl Acad Sci U S A. 2007 Apr 17;104(16):6852-7. Epub 2007 Apr 10

Kazuto Morozumi, Tomohide Shikano, Shunichi Miyazaki, and Ryuzo Yanagimachi

Simultaneous removal of sperm plasma membrane and acrosome before intracytoplasmic sperm injection improves oocyte activationembryonic development.
Proc Natl Acad Sci U S A. 2006 Nov 21;103(47):17661-6.

Narumi Ogonuki, Keiji Mochida, Hiromi Miki, Kimiko Inoue, Martin Fray, Takamasa Iwaki, Kazuo Moriwaki, Yuichi Obata, Kazuto Morozumi,

Ryuzo Yanagimachi, and Atsuo OguraSpermatozoa and spermatids retrieved from frozen reproductive organs or frozen whole bodies of male mice can produce normal offspring.
Proc Natl Acad Sci U S A. 2006 Aug 29;103(35):13098-103

Kazuto Morozumi and Ryuzo Yanagimachi:

Incorporation of the acrosome into the oocyte during ICSI could be potentially hazardous to embryo development.
Proc Natl Acad Sci U S A. 2005 Oct 4;102(40):14209-14.

Kazuto Morozumi, Hiroyuki Tateno, Kaoru Yanagida, Haruo Katayose, Yujiroh Kamiguchi and Akira Sato

Chromosomal analysis of mouse spermatozoa following physical and chemical treatments that are effective in inactivating HIV
Zygote. 2004 Nov;12(4):339-44.

Katayose H, Yanagida K, Hayashi S, Kuretake S, Morozumi K, Sato A.

Fertilization failure from a sperm chromatin defect in couples with unexplained infertility.
J Reprod Med. 2004 Sep;49(9):727-32

Kaoru Yanagida, Syotaro Hayashi, Haruo Katayose, Ryota Suganuma, Kazuto Morozumi and Akira Sato

Spindive and Chromosome Abnormality of Aged, Matured Oocytes in Human
Journal of Mammalian Ova Research,Vol. 19 (2002)No.3 pp.104-109