Shin-ichi Tomizawa

2.5k total citations · 1 hit paper
20 papers, 1.4k citations indexed

About

Shin-ichi Tomizawa is a scholar working on Molecular Biology, Genetics and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, Shin-ichi Tomizawa has authored 20 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Molecular Biology, 12 papers in Genetics and 7 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in Shin-ichi Tomizawa's work include Epigenetics and DNA Methylation (16 papers), Genetic Syndromes and Imprinting (9 papers) and Prenatal Screening and Diagnostics (7 papers). Shin-ichi Tomizawa is often cited by papers focused on Epigenetics and DNA Methylation (16 papers), Genetic Syndromes and Imprinting (9 papers) and Prenatal Screening and Diagnostics (7 papers). Shin-ichi Tomizawa collaborates with scholars based in Japan, United Kingdom and United States. Shin-ichi Tomizawa's co-authors include Gavin Kelsey, Simon Andrews, Sébastien A. Smallwood, Kenichiro Hata, Felix Krueger, Anne Segonds-Pichon, Shun Sato, Nico Ruf, Heba Saadeh and Kathleen R. Stewart-Morgan and has published in prestigious journals such as Nature Genetics, Genes & Development and Development.

In The Last Decade

Shin-ichi Tomizawa

17 papers receiving 1.4k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Dynamic CpG island methylation landscape in oocytes and preimplantation embryos

2011 500 citations Sébastien A. Smallwood, Shin-ichi Tomizawa et al. Nature Genetics profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Shin-ichi Tomizawa Japan	12	1.3k	622	464	314	183	20	1.4k
Diana Lucifero Canada	9	1.4k 1.1×	968 1.6×	853 1.8×	414 1.3×	192 1.0×	10	1.8k
Konstantin Lepikhov Germany	12	1.5k 1.2×	393 0.6×	266 0.6×	262 0.8×	92 0.5×	17	1.7k
So I Nagaoka Japan	12	826 0.7×	348 0.6×	347 0.7×	545 1.7×	179 1.0×	16	1.3k
Christian Popp United Kingdom	5	1.3k 1.1×	480 0.8×	251 0.5×	112 0.4×	82 0.4×	5	1.5k
Christian Pflueger United States	9	1.0k 0.8×	258 0.4×	209 0.5×	179 0.6×	187 1.0×	11	1.2k
Zhiyuan Chen United States	16	932 0.7×	432 0.7×	329 0.7×	223 0.7×	43 0.2×	21	1.2k
Teruko Taketo Canada	22	1.2k 0.9×	918 1.5×	281 0.6×	635 2.0×	515 2.8×	62	1.7k
Tianpeng Gu China	10	1.4k 1.1×	368 0.6×	243 0.5×	187 0.6×	51 0.3×	10	1.5k
Nathalie Peynot France	10	578 0.5×	352 0.6×	131 0.3×	418 1.3×	187 1.0×	20	939
Winifred Mak United States	16	1.3k 1.1×	803 1.3×	361 0.8×	233 0.7×	159 0.9×	32	1.8k

Countries citing papers authored by Shin-ichi Tomizawa

Since Specialization

Citations

This map shows the geographic impact of Shin-ichi Tomizawa's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Shin-ichi Tomizawa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Shin-ichi Tomizawa more than expected).

Fields of papers citing papers by Shin-ichi Tomizawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Shin-ichi Tomizawa. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Shin-ichi Tomizawa. The network helps show where Shin-ichi Tomizawa may publish in the future.

Co-authorship network of co-authors of Shin-ichi Tomizawa

This figure shows the co-authorship network connecting the top 25 collaborators of Shin-ichi Tomizawa. A scholar is included among the top collaborators of Shin-ichi Tomizawa based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Shin-ichi Tomizawa. Shin-ichi Tomizawa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Kuroha, Kazushige, et al.. (2025). Abnormal H3K27me3 underlies degenerative spermatogonial stem cells in cryptorchid testis. Development. 152(2).

Tomizawa, Shin-ichi, Rachel Fellows, Michio Ono, et al.. (2024). The non-canonical bivalent gene Wfdc15a controls spermatogenic protease and immune homeostasis. Development. 151(18). 1 indexed citations

Ono, Michio, Kuniko Nakajima, Shin-ichi Tomizawa, et al.. (2024). Spatial and temporal expression analysis of BMP signal modifiers, Smoc1 and Smoc2, from postnatal to adult developmental stages in the mouse testis. Gene Expression Patterns. 54. 119383–119383.

Shirakawa, Takayuki, Jafar Sharif, Shin-ichi Tomizawa, et al.. (2021). Maintenance DNA methylation in pre-meiotic germ cells regulates meiotic prophase by facilitating homologous chromosome pairing. Development. 148(10). 19 indexed citations

Kobayashi, Y., Shin-ichi Tomizawa, Michio Ono, et al.. (2021). Tsga8 is required for spermatid morphogenesis and male fertility in mice. Development. 148(8). 5 indexed citations

Naillat, Florence, Heba Saadeh, Joanna Nowacka‐Woszuk, et al.. (2021). Oxygen concentration affects de novo DNA methylation and transcription in in vitro cultured oocytes. Clinical Epigenetics. 13(1). 132–132. 13 indexed citations

Nakajima, Kuniko, Michio Ono, Shin-ichi Tomizawa, et al.. (2019). Lack of whey acidic protein four disulphide core (WFDC) 2 protease inhibitor causes neonatal death from respiratory failure in mice. Disease Models & Mechanisms. 12(11). 7 indexed citations

Tomizawa, Shin-ichi, Y. Kobayashi, Takayuki Shirakawa, et al.. (2018). Kmt2b conveys monovalent and bivalent H3K4me3 in mouse spermatogonial stem cells at germline and embryonic promoters. Development. 145(23). 30 indexed citations

Gahurová, Lenka, Shin-ichi Tomizawa, Sébastien A. Smallwood, et al.. (2017). Transcription and chromatin determinants of de novo DNA methylation timing in oocytes. Epigenetics & Chromatin. 10(1). 25–25. 67 indexed citations

10.

Ohbo, Kazuyuki & Shin-ichi Tomizawa. (2015). Epigenetic regulation in stem cell development, cell fate conversion, and reprogramming. BioMolecular Concepts. 6(1). 1–9. 8 indexed citations

11.

Kubo, Naoki, Hidehiro Toh, Kenjiro Shirane, et al.. (2015). DNA methylation and gene expression dynamics during spermatogonial stem cell differentiation in the early postnatal mouse testis. BMC Genomics. 16(1). 624–624. 102 indexed citations

12.

Stewart-Morgan, Kathleen R., Jeesun Kim, Jiahao Huang, et al.. (2015). Dynamic changes in histone modifications precede de novo DNA methylation in oocytes. Genes & Development. 29(23). 2449–2462. 149 indexed citations

13.

Smallwood, Sébastien A., Heba Saadeh, Kathleen R. Stewart-Morgan, et al.. (2015). Deep sequencing and de novo assembly of the mouse oocyte transcriptome define the contribution of transcription to the DNA methylation landscape. Genome biology. 16(1). 209–209. 153 indexed citations

14.

Tomizawa, Shin-ichi, Takayuki Shirakawa, & Kazuyuki Ohbo. (2014). Stem Cell Epigenetics: Insights from Studies on Embryonic, Induced Pluripotent, and Germline Stem Cells. Current Pathobiology Reports. 2(1). 1–9. 1 indexed citations

15.

Shirakawa, Takayuki, Shin-ichi Tomizawa, Kuniko Nakajima, et al.. (2013). An epigenetic switch is crucial for spermatogonia to exit the undifferentiated state toward a Kit-positive identity. Development. 140(17). 3565–3576. 66 indexed citations

16.

Tomizawa, Shin-ichi & Hiroyuki Sasaki. (2012). Genomic imprinting and its relevance to congenital disease, infertility, molar pregnancy and induced pluripotent stem cell. Journal of Human Genetics. 57(2). 84–91. 69 indexed citations

17.

Matsuzaki, Hitomi, Shin-ichi Tomizawa, Tomoko Ichiyanagi, et al.. (2012). Sequences in the H19 ICR that are transcribed as small RNA in oocytes are dispensable for methylation imprinting in YAC transgenic mice. Gene. 508(1). 26–34.

18.

Tomizawa, Shin-ichi, Joanna Nowacka‐Woszuk, & Gavin Kelsey. (2012). DNA methylation establishment during oocyte growth: mechanisms and significance. The International Journal of Developmental Biology. 56(10-11-12). 867–875. 79 indexed citations

19.

Tomizawa, Shin-ichi, Hisato Kobayashi, Toshiaki Watanabe, et al.. (2011). Dynamic stage-specific changes in imprinted differentially methylated regions during early mammalian development and prevalence of non-CpG methylation in oocytes. Development. 138(5). 811–820. 181 indexed citations

20.

Smallwood, Sébastien A., Shin-ichi Tomizawa, Felix Krueger, et al.. (2011). Dynamic CpG island methylation landscape in oocytes and preimplantation embryos. Nature Genetics. 43(8). 811–814. 500 indexed citations breakdown →

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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