Koji Okajima

2.0k total citations
57 papers, 1.6k citations indexed

About

Koji Okajima is a scholar working on Plant Science, Molecular Biology and Cellular and Molecular Neuroscience. According to data from OpenAlex, Koji Okajima has authored 57 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 44 papers in Plant Science, 43 papers in Molecular Biology and 32 papers in Cellular and Molecular Neuroscience. Recurrent topics in Koji Okajima's work include Light effects on plants (43 papers), Photosynthetic Processes and Mechanisms (38 papers) and Photoreceptor and optogenetics research (32 papers). Koji Okajima is often cited by papers focused on Light effects on plants (43 papers), Photosynthetic Processes and Mechanisms (38 papers) and Photoreceptor and optogenetics research (32 papers). Koji Okajima collaborates with scholars based in Japan, United States and Switzerland. Koji Okajima's co-authors include Masahiko Ikeuchi, Satoru Tokutomi, Sam‐Geun Kong, Yoshimasa Fukushima, Shigeru Itoh, Masahide Terazima, Akiko Kita, Yutaka Shibata, Kunio Miki and Shizue Yoshihara and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of the American Chemical Society and Journal of Biological Chemistry.

In The Last Decade

Koji Okajima

57 papers receiving 1.6k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Koji Okajima Japan	21	1.2k	1.1k	776	129	114	57	1.6k
Satoru Tokutomi Japan	35	2.8k 2.3×	2.7k 2.3×	1.5k 1.9×	170 1.3×	148 1.3×	103	3.4k
Yuliya Miloslavina Germany	12	686 0.6×	1.2k 1.1×	365 0.5×	134 1.0×	261 2.3×	14	1.4k
Norbert Michael Germany	24	1.3k 1.1×	1.3k 1.1×	831 1.1×	48 0.4×	156 1.4×	39	1.6k
Maxime Alexandre Netherlands	15	391 0.3×	894 0.8×	413 0.5×	102 0.8×	306 2.7×	20	1.1k
A. B. Rubin Russia	22	367 0.3×	1.0k 0.9×	452 0.6×	228 1.8×	347 3.0×	129	1.7k
Cristian Ilioaia France	17	655 0.5×	1.6k 1.4×	538 0.7×	128 1.0×	299 2.6×	30	1.8k
Jon Hughes Germany	33	2.6k 2.1×	2.3k 2.0×	1.1k 1.5×	106 0.8×	354 3.1×	82	2.9k
Mahir D. Mamedov Russia	23	387 0.3×	1.5k 1.3×	942 1.2×	125 1.0×	236 2.1×	112	1.8k
Tilo Mathes Germany	21	681 0.6×	880 0.8×	844 1.1×	184 1.4×	33 0.3×	41	1.2k
Paul J. M. van Kan Netherlands	14	301 0.3×	819 0.7×	366 0.5×	130 1.0×	168 1.5×	16	1.0k

Countries citing papers authored by Koji Okajima

Since Specialization

Citations

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

Fields of papers citing papers by Koji Okajima

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koji Okajima

This figure shows the co-authorship network connecting the top 25 collaborators of Koji Okajima. A scholar is included among the top collaborators of Koji Okajima 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 Koji Okajima. Koji Okajima 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

Yamamoto, Takahiro, Yuki Takayama, Koji Okajima, et al.. (2023). Ultrastructure and fractal property of chromosomes in close-to-native yeast nuclei visualized using X-ray laser diffraction. Scientific Reports. 13(1). 10802–10802. 3 indexed citations

Kimura, Taro, et al.. (2020). Arabidopsis ROOT PHOTOTROPISM2 Is a Light-Dependent Dynamic Modulator of Phototropin1. The Plant Cell. 32(6). 2004–2019. 16 indexed citations

Nakasako, Masayoshi, Amane Kobayashi, Yuki Takayama, et al.. (2020). Methods and application of coherent X-ray diffraction imaging of noncrystalline particles. Biophysical Reviews. 12(2). 541–567. 10 indexed citations

Nakasone, Yusuke, et al.. (2019). Photoreaction Dynamics of Full-Length Phototropin from Chlamydomonas reinhardtii. The Journal of Physical Chemistry B. 123(51). 10939–10950. 8 indexed citations

Nakasone, Yusuke, et al.. (2018). Photoreaction Dynamics of LOV1 and LOV2 of Phototropin from Chlamydomonas reinhardtii. The Journal of Physical Chemistry B. 122(6). 1801–1815. 14 indexed citations

Kobayashi, Amane, Yuki Takayama, Koji Okajima, et al.. (2018). Diffraction apparatus and procedure in tomography X-ray diffraction imaging for biological cells at cryogenic temperature using synchrotron X-ray radiation. Journal of Synchrotron Radiation. 25(6). 1803–1818. 10 indexed citations

Fujii, Yuta, Hiroyuki Tanaka, Naotake Konno, et al.. (2017). Phototropin perceives temperature based on the lifetime of its photoactivated state. Proceedings of the National Academy of Sciences. 114(34). 9206–9211. 130 indexed citations

Nakasone, Yusuke, et al.. (2017). Light-Induced Conformational Changes of LOV2-Kinase and the Linker Region in Arabidopsis Phototropin2. The Journal of Physical Chemistry B. 121(17). 4414–4421. 10 indexed citations

Okajima, Koji, Sachiko Kashojiya, Yuki Takayama, et al.. (2016). Blue Light-excited Light-Oxygen-Voltage-sensing Domain 2 (LOV2) Triggers a Rearrangement of the Kinase Domain to Induce Phosphorylation Activity in Arabidopsis Phototropin1. Journal of Biological Chemistry. 291(38). 19975–19984. 13 indexed citations

10.

Kong, Sam‐Geun & Koji Okajima. (2016). Diverse photoreceptors and light responses in plants. Journal of Plant Research. 129(2). 111–114. 97 indexed citations

11.

Kashojiya, Sachiko, Koji Okajima, Takashi Shimada, & Satoru Tokutomi. (2015). Essential Role of the A’α/Aβ Gap in the N-Terminal Upstream of LOV2 for the Blue Light Signaling from LOV2 to Kinase in Arabidopsis Photototropin1, a Plant Blue Light Receptor. PLoS ONE. 10(4). e0124284–e0124284. 11 indexed citations

12.

Okajima, Koji, Yusuke Aihara, Yuki Takayama, et al.. (2013). Light-induced Conformational Changes of LOV1 (Light Oxygen Voltage-sensing Domain 1) and LOV2 Relative to the Kinase Domain and Regulation of Kinase Activity in Chlamydomonas Phototropin. Journal of Biological Chemistry. 289(1). 413–422. 38 indexed citations

13.

Okajima, Koji, Sachiko Kashojiya, & Satoru Tokutomi. (2012). Photosensitivity of Kinase Activation by Blue Light Involves the Lifetime of a Cysteinyl-Flavin Adduct Intermediate, S390, in the Photoreaction Cycle of the LOV2 Domain in Phototropin, a Plant Blue Light Receptor. Journal of Biological Chemistry. 287(49). 40972–40981. 38 indexed citations

14.

Demarsy, Emilie, Isabelle Schepens, Koji Okajima, et al.. (2012). Phytochrome Kinase Substrate 4 is phosphorylated by the phototropin 1 photoreceptor. The EMBO Journal. 31(16). 3457–3467. 77 indexed citations

15.

Tanaka, Keisuke, et al.. (2010). Macromolecular Crowding Effects on Reactions of TePixD (Tll0078)^†. Photochemistry and Photobiology. 87(3). 584–589. 10 indexed citations

16.

Fukushima, Yoshimasa, Koji Okajima, Masahiko Ikeuchi, & Shigeru Itoh. (2007). Two Intermediate States I and J Trapped at Low Temperature in the Photocycles of two BLUF Domain Proteins of Cyanobacteria Synechocystis sp. PCC6803 and Thermosynechococcus elongatus BP-1†. Photochemistry and Photobiology. 83(1). 112–121. 12 indexed citations

17.

Shimada, Takashi, et al.. (2006). Characterization of Cyanobacteriochrome TePixJ from a Thermophilic Cyanobacterium Thermosynechococcus elongatus Strain BP-1. Plant and Cell Physiology. 47(9). 1251–1261. 78 indexed citations

18.

Narikawa, Rei, Kazunori Zikihara, Koji Okajima, et al.. (2006). Three Putative Photosensory Light, Oxygen or Voltage (LOV) Domains with Distinct Biochemical Properties from the Filamentous Cyanobacterium Anabaena sp. PCC 7120. Photochemistry and Photobiology. 82(6). 1627–1627. 14 indexed citations

19.

Kita, Akiko, Koji Okajima, Y. Morimoto, Masahiko Ikeuchi, & Kunio Miki. (2005). Structure of a Cyanobacterial BLUF Protein, Tll0078, Containing a Novel FAD-binding Blue Light Sensor Domain. Journal of Molecular Biology. 349(1). 1–9. 135 indexed citations

20.

Okajima, Koji, Shizue Yoshihara, Yoshimasa Fukushima, et al.. (2005). Biochemical and Functional Characterization of BLUF-Type Flavin-Binding Proteins of Two Species of Cyanobacteria. The Journal of Biochemistry. 137(6). 741–750. 121 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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