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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Microbiology 59 3334 3058 130 123 197 9975

Eiji Masai publications per year

The chart shows the history of publications by Eiji Masai between 1989 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Eiji Masai published across 37 years, from 1989 to 2025, averaging 6.9 papers a year. Output peaked at 15 publications in 2009. 22 of the 257 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1989 to 2025. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 2009. 1989: 1 publication 1990: 1 publication 1991: 1 publication 1992: 0 publications 1993: 1 publication 1994: 0 publications 1995: 3 publications 1996: 4 publications 1997: 5 publications 1998: 5 publications 1999: 7 publications 2000: 7 publications 2001: 6 publications 2002: 10 publications 2003: 10 publications 2004: 12 publications 2005: 4 publications 2006: 5 publications 2007: 5 publications 2008: 7 publications 2009: 15 publications 2010: 12 publications 2011: 12 publications 2012: 11 publications 2013: 7 publications 2014: 15 publications 2015: 6 publications 2016: 8 publications 2017: 5 publications 2018: 9 publications 2019: 7 publications 2020: 8 publications 2021: 5 publications 2022: 10 publications 2023: 11 publications 2024: 9 publications 2025: 13 publications
1989 2025

257 publications in total across all disciplines

View publications per year as a table
Eiji Masai: publications per year, 1989 to 2025
Year Publications
1989 1
1990 1
1991 1
1992 0
1993 1
1994 0
1995 3
1996 4
1997 5
1998 5
1999 7
2000 7
2001 6
2002 10
2003 10
2004 12
2005 4
2006 5
2007 5
2008 7
2009 15
2010 12
2011 12
2012 11
2013 7
2014 15
2015 6
2016 8
2017 5
2018 9
2019 7
2020 8
2021 5
2022 10
2023 11
2024 9
2025 13
Total 257
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Eiji Masai publication distribution in Microbiology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Microbiology in 2026. The highlighted bar marks where Eiji Masai sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 64 bars. Horizontal axis: publications, 55–64 to 679+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 135–144 publications. The last bar groups every scientist with 679 publications or more. The highlighted bar, 195–204 publications, is where this scientist sits. 55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 265 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 234 scientists 205–214 publications: 208 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55–64 publications 679+

This scientist: 197 publications — 47th percentile

47% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

View publications distribution as a table
Number of Microbiology scientists by publication count, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
Publications Scientists This scientist
55–64 8
65–74 29
75–84 55
85–94 112
95–104 137
105–114 190
115–124 235
125–134 234
135–144 288
145–154 265
155–164 264
165–174 253
175–184 276
185–194 190
195–204 234 197
205–214 208
215–224 198
225–234 155
235–244 161
245–254 160
255–264 146
265–274 139
275–284 148
285–294 115
295–304 96
305–314 88
315–324 106
325–334 65
335–344 76
345–354 64
355–364 62
365–374 65
375–384 61
385–394 34
395–404 44
405–414 36
415–424 35
425–434 29
435–444 33
445–454 34
455–464 25
465–474 26
475–484 20
485–494 19
495–504 16
505–514 17
515–524 23
525–534 14
535–544 14
545–554 18
555–564 12
565–574 7
575–584 9
585–594 9
595–604 9
605–614 7
615–624 9
625–634 7
635–644 4
645–654 5
655–664 6
665–674 7
675–678 3
679+ 99
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Eiji Masai D-index placement in Microbiology in 2026

The chart shows the D-index (discipline H-index) distribution of Microbiology scientists ranked by Research.com in 2026. The highlighted bar marks where Eiji Masai sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 88 bars. Horizontal axis: D-Index, 40 to 127+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 58 D-Index. The last bar groups every scientist with 127 D-Index or more. The highlighted bar, 59 D-Index, is where this scientist sits. 40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 112 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 123 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 94 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 59 D-Index — 42nd percentile

42% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

View D-Index distribution as a table
Number of Microbiology scientists by D-index, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
D-Index Scientists This scientist
40 30
41 86
42 90
43 117
44 122
45 123
46 108
47 110
48 106
49 109
50 129
51 111
52 116
53 127
54 134
55 134
56 112
57 136
58 162
59 151 59
60 139
61 123
62 126
63 144
64 109
65 103
66 124
67 112
68 103
69 131
70 94
71 93
72 96
73 92
74 80
75 66
76 87
77 60
78 73
79 59
80 57
81 55
82 47
83 77
84 50
85 45
86 42
87 41
88 32
89 38
90 35
91 34
92 27
93 26
94 33
95 22
96 37
97 22
98 21
99 22
100 30
101 16
102 20
103 17
104 19
105 16
106 19
107 18
108 14
109 10
110 9
111 7
112 11
113 6
114 15
115 10
116 12
117 7
118 10
119 10
120 11
121 2
122 7
123 12
124 5
125 9
126 6
127+ 95
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Overview

Eiji Masai is affiliated with Nagaoka University of Technology in Japan. Their research primarily spans the fields of Biochemistry, Genetics and Molecular Biology, and Engineering, with significant contributions in Biomedical Engineering, Biotechnology, Molecular Biology, Plant Science, and Biomaterials.

The main topics addressed in Masai's work include biochemical and biochemical processes, lignin and wood chemistry, enzyme-mediated dye degradation, biofuel production and bioconversion, microbial metabolic engineering and bioproduction, plant gene expression analysis, and plant biochemistry and biosynthesis.

Masai's frequent coauthors reflect collaborations with researchers specializing in similar fields. These include Naofumi Kamimura, Masaya Nakamura, Takuma Araki, Yudai Higuchi, and Yuichiro Otsuka.

Publication venues where Masai often publishes research include:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Bioresource Technology
  • Scientific Reports
  • Applied and Environmental Microbiology
  • Journal of Bioscience and Bioengineering

Representative recent papers by Masai include:

  • "Characterization of aromatic acid/proton symporters in Pseudomonas putida KT2440 toward efficient microbial conversion of lignin-related aromatics," 2021, Metabolic Engineering
  • "Lignin valorization through efficient microbial production of β-ketoadipate from industrial black liquor," 2021, Bioresource Technology
  • "Development of the production of 2-pyrone-4,6-dicarboxylic acid from lignin extracts, which are industrially formed as by-products, as raw materials," 2020, Journal of Bioscience and Bioengineering
  • "High-level production of 2-pyrone-4,6-dicarboxylic acid from vanillic acid as a lignin-related aromatic compound by metabolically engineered fermentation to realize industrial valorization processes of lignin," 2023, Bioresource Technology
  • "Identification of enzymatic genes with the potential to reduce biomass recalcitrance through lignin manipulation in Arabidopsis," 2020, Biotechnology for Biofuels

Best Publications

  • Phthalates impact human health: Epidemiological evidences and plausible mechanism of action.

    Sailas Benjamin;Sailas Benjamin;Eiji Masai;Naofumi Kamimura;Kenji Takahashi

  • Genetic and Biochemical Investigations on Bacterial Catabolic Pathways for Lignin-Derived Aromatic Compounds

    Eiji Masai;Yoshihiro Katayama;Masao Fukuda

  • Bacterial catabolism of lignin-derived aromatics: New findings in a recent decade: Update on bacterial lignin catabolism.

    Naofumi Kamimura;Kenji Takahashi;Kosuke Mori;Takuma Araki

  • Characterization of biphenyl catabolic genes of gram-positive polychlorinated biphenyl degrader Rhodococcus sp. strain RHA1.

    E Masai;A Yamada;J M Healy;T Hatta

  • Advances in microbial lignin degradation and its applications.

    Naofumi Kamimura;Shingo Sakamoto;Nobutaka Mitsuda;Eiji Masai

  • A monograph on the remediation of hazardous phthalates

    Sailas Benjamin;Selvanesan Pradeep;Moolakkariyil Sarath Josh;Sunil Kumar

  • Crystal structure of an aromatic ring opening dioxygenase LigAB, a protocatechuate 4,5-dioxygenase, under aerobic conditions

    Keisuke Sugimoto;Toshiya Senda;Hisae Aoshima;Eiji Masai

  • Crystal structure of the terminal oxygenase component of biphenyl dioxygenase derived from Rhodococcus sp. strain RHA1.

    Yutaka Furusawa;Venugopalan Nagarajan;Masaru Tanokura;Eiji Masai

  • Roles of the Enantioselective Glutathione S-Transferases in Cleavage of β-Aryl Ether

    Eiji Masai;Atsushi Ichimura;Yusuke Sato;Keisuke Miyauchi

  • Novel 2,4-Dichlorophenoxyacetic Acid Degradation Genes from Oligotrophic Bradyrhizobium sp. Strain HW13 Isolated from a Pristine Environment

    Wataru Kitagawa;Sachiko Takami;Keisuke Miyauchi;Eiji Masai

  • Efficient production of 2-pyrone 4,6-dicarboxylic acid as a novel polymer-based material from protocatechuate by microbial function.

    Yuichiro Otsuka;Masaya Nakamura;Kiyotaka Shigehara;Kosuke Sugimura

  • Characterization of the Terephthalate Degradation Genes of Comamonas sp. Strain E6

    Unknown

  • A tetrahydrofolate-dependent O-demethylase, LigM, is crucial for catabolism of vanillate and syringate in Sphingomonas paucimobilis SYK-6.

    Tomokuni Abe;Eiji Masai;Keisuke Miyauchi;Yoshihiro Katayama

  • The bphDEF meta-cleavage pathway genes involved in biphenyl/polychlorinated biphenyl degradation are located on a linear plasmid and separated from the initial bphACB genes in Rhodococcus sp. strain RHA1.

    Eiji Masai;Katsumi Sugiyama;Naoko Iwashita;Satoru Shimizu

  • Glucose-Free cis,cis-Muconic Acid Production via New Metabolic Designs Corresponding to the Heterogeneity of Lignin

    Tomonori Sonoki;Kenji Takahashi;Haruka Sugita;Minami Hatamura

  • Crystal Structures of the Reaction Intermediate and its Homologue of an Extradiol-cleaving Catecholic Dioxygenase

    Nobuyuki Sato;Yoshitaka Uragami;Tomoko Nishizaki;Yoshito Takahashi

  • A bacterial enzyme degrading the model lignin compound β‐etherase is a member of the glutathione‐S‐transferase superfamily

    Eiji Masai;Yoshihiro Katayama;Sachiko Kubota;Shinya Kawai

  • Genetic and Biochemical Characterization of a 2-Pyrone-4,6-Dicarboxylic Acid Hydrolase Involved in the Protocatechuate 4,5-Cleavage Pathway of Sphingomonas paucimobilis SYK-6

    Eiji Masai;Shouji Shinohara;Hirofumi Hara;Seiji Nishikawa

  • Uncovering the Protocatechuate 2,3-Cleavage Pathway Genes

    Daisuke Kasai;Toshihiro Fujinami;Tomokuni Abe;Kohei Mase

  • Characterization of the Isophthalate Degradation Genes of Comamonas sp. Strain E6

    Yuki Fukuhara;Keisuke Inakazu;Norimichi Kodama;Naofumi Kamimura

  • Identification of Three Alcohol Dehydrogenase Genes Involved in the Stereospecific Catabolism of Arylglycerol-β-Aryl Ether by Sphingobium sp. Strain SYK-6

    Yusuke Sato;Hideki Moriuchi;Shojiro Hishiyama;Yuichiro Otsuka

  • Cloning and Characterization of the Ferulic Acid Catabolic Genes of Sphingomonas paucimobilis SYK-6

    Eiji Masai;Kyo Harada;Xue Peng;Hirotaka Kitayama

  • Crystal structure of NADH-dependent ferredoxin reductase component in biphenyl dioxygenase.

    T Senda;T Yamada;N Sakurai;M Kubota

Frequent Co-Authors

Masao Fukuda
Masao Fukuda Chubu University
Masaya Nakamura
Masaya Nakamura Keio University
Tsuyoshi Michinobu
Tsuyoshi Michinobu Tokyo Institute of Technology
Yoichi Kamagata
Yoichi Kamagata National Institute of Advanced Industrial Science and Technology
Kensuke Furukawa
Kensuke Furukawa Beppu University
Nobutaka Mitsuda
Nobutaka Mitsuda National Institute of Advanced Industrial Science and Technology
Jun Kikuchi
Jun Kikuchi Yokohama City University
Yoshiaki Nakao
Yoshiaki Nakao Kyoto University
John Ralph
John Ralph Great Lakes Bioenergy Research Center

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