Kei Ito

3.4k total citations
51 papers, 385 citations indexed

About

Kei Ito is a scholar working on Astronomy and Astrophysics, Instrumentation and Nuclear and High Energy Physics. According to data from OpenAlex, Kei Ito has authored 51 papers receiving a total of 385 indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Astronomy and Astrophysics, 18 papers in Instrumentation and 10 papers in Nuclear and High Energy Physics. Recurrent topics in Kei Ito's work include Galaxies: Formation, Evolution, Phenomena (28 papers), Astronomy and Astrophysical Research (18 papers) and Stellar, planetary, and galactic studies (7 papers). Kei Ito is often cited by papers focused on Galaxies: Formation, Evolution, Phenomena (28 papers), Astronomy and Astrophysical Research (18 papers) and Stellar, planetary, and galactic studies (7 papers). Kei Ito collaborates with scholars based in Japan, United States and United Kingdom. Kei Ito's co-authors include Masayuki Tanaka, Nobunari Kashikawa, Francesco Valentino, Yongming Liang, Mariko Kubo, Sune Toft, Shigeji Fujita, Jun Toshikawa, Makoto Ando and John R. Weaver and has published in prestigious journals such as Physical review. B, Condensed matter, The Astrophysical Journal and Physical Review B.

In The Last Decade

Kei Ito

46 papers receiving 304 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kei Ito Japan 12 275 145 70 32 25 51 385
Donnacha Kirk United Kingdom 7 386 1.4× 177 1.2× 64 0.9× 12 0.4× 19 0.8× 7 421
É. Aubourg France 11 355 1.3× 82 0.6× 92 1.3× 12 0.4× 15 0.6× 21 389
Zhao‐Yu Li China 15 593 2.2× 321 2.2× 64 0.9× 79 2.5× 38 1.5× 44 718
H. J. Witt Germany 14 680 2.5× 194 1.3× 85 1.2× 24 0.8× 14 0.6× 28 726
Brett S. Blacker United States 2 558 2.0× 303 2.1× 64 0.9× 42 1.3× 29 1.2× 9 583
Ji Yao China 9 140 0.5× 74 0.5× 44 0.6× 15 0.5× 10 0.4× 33 239
Zolt Levay United States 3 615 2.2× 320 2.2× 68 1.0× 41 1.3× 28 1.1× 4 634
Deborah Lokhorst Canada 10 488 1.8× 233 1.6× 83 1.2× 16 0.5× 9 0.4× 23 522
Naoyuki Tamura Japan 15 603 2.2× 426 2.9× 38 0.5× 52 1.6× 20 0.8× 58 685

Countries citing papers authored by Kei Ito

Since Specialization
Citations

This map shows the geographic impact of Kei Ito'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 Kei Ito with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kei Ito more than expected).

Fields of papers citing papers by Kei Ito

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kei Ito. 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 Kei Ito. The network helps show where Kei Ito may publish in the future.

Co-authorship network of co-authors of Kei Ito

This figure shows the co-authorship network connecting the top 25 collaborators of Kei Ito. A scholar is included among the top collaborators of Kei Ito 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 Kei Ito. Kei Ito is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Allen, Natalie, Pascal A. Oesch, Sune Toft, et al.. (2025). Galaxy size and mass build-up in the first 2 Gyr of cosmic history from multi-wavelength JWST NIRCam imaging. Astronomy and Astrophysics. 698. A30–A30. 10 indexed citations
2.
Shuntov, Marko, Gabriel Brammer, Natalie Allen, et al.. (2025). DAWN JWST Archive: Morphology from profile fitting of over 340 000 galaxies in major JWST fields. Astronomy and Astrophysics. 699. A343–A343. 2 indexed citations
3.
Toshikawa, Jun, Stijn Wuyts, Hisakazu Uchiyama, et al.. (2025). Galaxy properties from the outskirts to the core of a protocluster at z = 3.70. Monthly Notices of the Royal Astronomical Society. 537(4). 3561–3574. 2 indexed citations
4.
Baker, William, Kei Ito, Francesco Valentino, et al.. (2025). Double trouble: Two spectroscopically confirmed low-mass quiescent galaxies at z > 5 in overdensities. Astronomy and Astrophysics. 706. A91–A91.
5.
6.
Matsui, S., et al.. (2024). X-ray stacking reveals average SMBH accretion properties of star-forming galaxies and their cosmic evolution over 4 ≲ z ≲ 7. Monthly Notices of the Royal Astronomical Society. 529(2). 926–940.
7.
Whitaker, Katherine E., John R. Weaver, Sam E. Cutler, et al.. (2024). Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS. The Astrophysical Journal Letters. 964(1). L10–L10. 9 indexed citations
8.
Shimasaku, Kazuhiro, Sandro Tacchella, Makoto Ando, et al.. (2023). HINOTORI I: The nature of rejuvenation galaxies. Publications of the Astronomical Society of Japan. 76(1). 1–26. 5 indexed citations
9.
Toshikawa, Jun, Stijn Wuyts, Nobunari Kashikawa, et al.. (2023). An enhanced abundance of bright galaxies in protocluster candidates at z ∼ 3–5. Monthly Notices of the Royal Astronomical Society. 527(3). 6276–6291. 10 indexed citations
10.
Kashikawa, Nobunari, Yoshiki Matsuoka, Wanqiu He, et al.. (2023). Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XVIII. The Dark Matter Halo Mass of Quasars at z ∼ 6. The Astrophysical Journal. 954(2). 210–210. 20 indexed citations
11.
Ito, Kei, Masayuki Tanaka, Francesco Valentino, et al.. (2023). COSMOS2020: Discovery of a Protocluster of Massive Quiescent Galaxies at z = 2.77. The Astrophysical Journal Letters. 945(1). L9–L9. 25 indexed citations
12.
Uchiyama, Hisakazu, Takuji Yamashita, Jun Toshikawa, et al.. (2022). A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). VI. Distant Filamentary Structures Pointed Out by High-z Radio Galaxies at z ∼ 4. The Astrophysical Journal. 926(1). 76–76. 6 indexed citations
13.
Ito, Kei, Masayuki Tanaka, T. Miyaji, et al.. (2022). COSMOS2020: Ubiquitous AGN Activity of Massive Quiescent Galaxies at 0 < z < 5 Revealed by X-Ray and Radio Stacking. The Astrophysical Journal. 929(1). 53–53. 23 indexed citations
14.
Kashikawa, Nobunari, Daichi Kashino, Kei Ito, et al.. (2022). The physical origin for spatially large scatter of IGM opacity at the end of reionization: The IGM Lyα opacity-galaxy density relation. Monthly Notices of the Royal Astronomical Society. 515(4). 5914–5926. 15 indexed citations
15.
Yoshioka, T., Nobunari Kashikawa, Akio Inoue, et al.. (2022). CHORUS. IV. Mapping the Spatially Inhomogeneous Cosmic Reionization with Subaru HSC. The Astrophysical Journal. 927(1). 32–32. 7 indexed citations
16.
Ito, Kei, Nobunari Kashikawa, Masayuki Tanaka, et al.. (2021). Interrelation of the Environment of Lyα Emitters and Massive Galaxies at 2 < z < 4.5. The Astrophysical Journal. 916(1). 35–35. 8 indexed citations
17.
Kashikawa, Nobunari, Masafusa Onoue, Yoshiki Matsuoka, et al.. (2020). Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XI. Proximity Zone Analysis for Faint Quasar Spectra at z ∼ 6. The Astrophysical Journal. 903(1). 60–60. 13 indexed citations
18.
Uchiyama, Hisakazu, Nobunari Kashikawa, Roderik Overzier, et al.. (2019). Suppression of Low-mass Galaxy Formation around Quasars at z ∼ 2–3. The Astrophysical Journal. 870(1). 45–45. 9 indexed citations
19.
Higuchi, Ryo, Masami Ouchi, Yoshiaki Ono, et al.. (2019). SILVERRUSH. VII. Subaru/HSC Identifications of Protocluster Candidates at z ∼ 6–7: Implications for Cosmic Reionization. The Astrophysical Journal. 879(1). 28–28. 45 indexed citations
20.
Fujii, Naoyuki, M. Miyamoto, & Kei Ito. (1977). The structure of protoplanets during early growth from planetesimals. 262–267. 1 indexed citations

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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