| Discipline name | D-Index | World Ranking | Current World Ranking | National Ranking | Current National Ranking | Publications | Citations |
|---|---|---|---|---|---|---|---|
| Biology and Biochemistry | 92 | 2238 | 2035 | 135 | 123 | 603 | 27050 |
The chart shows the history of publications by Ken Takai between 1974 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ken Takai published across 52 years, from 1974 to 2025, averaging 14.9 papers a year. Output peaked at 116 publications in 2019. 24 of the 774 publications appeared in the last two years.
774 publications in total across all disciplines
| Year | Publications |
|---|---|
| 1974 | 1 |
| 1975 | 1 |
| 1976 | 1 |
| 1977 | 0 |
| 1978 | 0 |
| 1979 | 0 |
| 1980 | 0 |
| 1981 | 0 |
| 1982 | 0 |
| 1983 | 0 |
| 1984 | 0 |
| 1985 | 0 |
| 1986 | 0 |
| 1987 | 0 |
| 1988 | 0 |
| 1989 | 0 |
| 1990 | 0 |
| 1991 | 0 |
| 1992 | 0 |
| 1993 | 0 |
| 1994 | 0 |
| 1995 | 0 |
| 1996 | 1 |
| 1997 | 1 |
| 1998 | 2 |
| 1999 | 4 |
| 2000 | 7 |
| 2001 | 9 |
| 2002 | 6 |
| 2003 | 18 |
| 2004 | 14 |
| 2005 | 20 |
| 2006 | 21 |
| 2007 | 15 |
| 2008 | 16 |
| 2009 | 22 |
| 2010 | 20 |
| 2011 | 17 |
| 2012 | 53 |
| 2013 | 34 |
| 2014 | 43 |
| 2015 | 40 |
| 2016 | 38 |
| 2017 | 41 |
| 2018 | 35 |
| 2019 | 116 |
| 2020 | 105 |
| 2021 | 19 |
| 2022 | 13 |
| 2023 | 17 |
| 2024 | 11 |
| 2025 | 13 |
| Total | 774 |
The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Ken Takai sits on this spectrum.
This scientist: 603 publications — 97th percentile
97% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 1,028 publications or more.
| Publications | Scientists | This scientist |
|---|---|---|
| 47–56 | 8 | |
| 57–66 | 35 | |
| 67–76 | 106 | |
| 77–86 | 231 | |
| 87–96 | 413 | |
| 97–106 | 546 | |
| 107–116 | 704 | |
| 117–126 | 848 | |
| 127–136 | 980 | |
| 137–146 | 942 | |
| 147–156 | 969 | |
| 157–166 | 949 | |
| 167–176 | 951 | |
| 177–186 | 915 | |
| 187–196 | 787 | |
| 197–206 | 840 | |
| 207–216 | 733 | |
| 217–226 | 708 | |
| 227–236 | 651 | |
| 237–246 | 605 | |
| 247–256 | 510 | |
| 257–266 | 524 | |
| 267–276 | 434 | |
| 277–286 | 417 | |
| 287–296 | 350 | |
| 297–306 | 363 | |
| 307–316 | 315 | |
| 317–326 | 296 | |
| 327–336 | 261 | |
| 337–346 | 240 | |
| 347–356 | 219 | |
| 357–366 | 196 | |
| 367–376 | 154 | |
| 377–386 | 161 | |
| 387–396 | 155 | |
| 397–406 | 145 | |
| 407–416 | 124 | |
| 417–426 | 112 | |
| 427–436 | 132 | |
| 437–446 | 116 | |
| 447–456 | 99 | |
| 457–466 | 81 | |
| 467–476 | 91 | |
| 477–486 | 80 | |
| 487–496 | 80 | |
| 497–506 | 59 | |
| 507–516 | 36 | |
| 517–526 | 46 | |
| 527–536 | 54 | |
| 537–546 | 44 | |
| 547–556 | 43 | |
| 557–566 | 43 | |
| 567–576 | 42 | |
| 577–586 | 25 | |
| 587–596 | 34 | |
| 597–606 | 23 | 603 |
| 607–616 | 33 | |
| 617–626 | 31 | |
| 627–636 | 27 | |
| 637–646 | 25 | |
| 647–656 | 28 | |
| 657–666 | 34 | |
| 667–676 | 18 | |
| 677–686 | 16 | |
| 687–696 | 10 | |
| 697–706 | 12 | |
| 707–716 | 21 | |
| 717–726 | 12 | |
| 727–736 | 12 | |
| 737–746 | 10 | |
| 747–756 | 7 | |
| 757–766 | 13 | |
| 767–776 | 15 | |
| 777–786 | 13 | |
| 787–796 | 9 | |
| 797–806 | 9 | |
| 807–816 | 7 | |
| 817–826 | 4 | |
| 827–836 | 9 | |
| 837–846 | 7 | |
| 847–856 | 3 | |
| 857–866 | 5 | |
| 867–876 | 5 | |
| 877–886 | 11 | |
| 887–896 | 3 | |
| 897–906 | 4 | |
| 907–916 | 7 | |
| 917–926 | 5 | |
| 927–936 | 6 | |
| 937–946 | 6 | |
| 947–956 | 3 | |
| 957–966 | 7 | |
| 967–976 | 2 | |
| 977–986 | 2 | |
| 987–996 | 1 | |
| 997–1,006 | 5 | |
| 1,007–1,016 | 2 | |
| 1,017–1,026 | 2 | |
| 1,027 | 1 | |
| 1,028+ | 100 |
The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Ken Takai sits on this spectrum.
This scientist: 92 D-Index — 89th percentile
89% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 167 D-Index or more.
| D-Index | Scientists | This scientist |
|---|---|---|
| 40–41 | 80 | |
| 42–43 | 183 | |
| 44–45 | 316 | |
| 46–47 | 504 | |
| 48–49 | 718 | |
| 50–51 | 899 | |
| 52–53 | 1,025 | |
| 54–55 | 1,149 | |
| 56–57 | 1,235 | |
| 58–59 | 1,253 | |
| 60–61 | 1,162 | |
| 62–63 | 1,130 | |
| 64–65 | 1,031 | |
| 66–67 | 897 | |
| 68–69 | 814 | |
| 70–71 | 714 | |
| 72–73 | 709 | |
| 74–75 | 596 | |
| 76–77 | 512 | |
| 78–79 | 473 | |
| 80–81 | 412 | |
| 82–83 | 373 | |
| 84–85 | 358 | |
| 86–87 | 285 | |
| 88–89 | 273 | |
| 90–91 | 227 | |
| 92–93 | 208 | 92 |
| 94–95 | 193 | |
| 96–97 | 153 | |
| 98–99 | 157 | |
| 100–101 | 148 | |
| 102–103 | 120 | |
| 104–105 | 113 | |
| 106–107 | 100 | |
| 108–109 | 86 | |
| 110–111 | 67 | |
| 112–113 | 71 | |
| 114–115 | 73 | |
| 116–117 | 64 | |
| 118–119 | 53 | |
| 120–121 | 60 | |
| 122–123 | 54 | |
| 124–125 | 43 | |
| 126–127 | 38 | |
| 128–129 | 49 | |
| 130–131 | 26 | |
| 132–133 | 18 | |
| 134–135 | 23 | |
| 136–137 | 32 | |
| 138–139 | 32 | |
| 140–141 | 27 | |
| 142–143 | 19 | |
| 144–145 | 22 | |
| 146–147 | 12 | |
| 148–149 | 16 | |
| 150–151 | 14 | |
| 152–153 | 10 | |
| 154–155 | 13 | |
| 156–157 | 10 | |
| 158–159 | 7 | |
| 160–161 | 9 | |
| 162–163 | 13 | |
| 164–165 | 4 | |
| 166 | 4 | |
| 167+ | 98 |
Ken Takai is affiliated with the Japan Agency for Marine-Earth Science and Technology. Their research intersects multiple domains within environmental science, with a particular focus on microbiology, molecular biology, and geosciences.
The scientist's recent published papers cover a range of topics and venues, highlighting interdisciplinary approaches to microbial ecology and geochemistry. These include:
Key coauthors who frequently collaborate with Ken Takai include:
The researcher is active in publishing within specific academic venues. These publication venues include:
Ken Takai's main areas of study span environmental science broadly, with subfields covering environmental chemistry, molecular biology, astronomy and astrophysics, ecology, and oceanography.
Their research topics demonstrate a focus on:
Ken Takai;Koki Horikoshi
Ken Takai;Kentaro Nakamura;Tomohiro Toki;Urumu Tsunogai
Fumio Inagaki;Takuro Nunoura;Satoshi Nakagawa;Andreas Teske
Barbara J. Campbell;Annette Summers Engel;Megan L. Porter;Ken Takai
Hiroyuki Imachi;Masaru K. Nobu;Nozomi Nakahara;Nozomi Nakahara;Nozomi Nakahara;Yuki Morono
Ken Takai;Koki Horikoshi
Fumio Inagaki;Masae Suzuki;Ken Takai;Hanako Oida
Ken Takai;Duane P. Moser;Mary DeFlaun;Tullis C. Onstott
Fumio Inagaki;Ken Takai;Kenneth H. Nealson;Kenneth H. Nealson;Koki Horikoshi
Takuro Nunoura;Yoshihiro Takaki;Jungo Kakuta;Shinro Nishi
David W. Waite;Inka Vanwonterghem;Christian Rinke;Donovan H. Parks
Ken Takai;Tetsushi Komatsu;Fumio Inagaki;Koki Horikoshi
Satoshi Nakagawa;Ken Takai
Ken Takai;Masae Suzuki;Satoshi Nakagawa;Masayuki Miyazaki
Takuro Nunoura;Yoshihiro Takaki;Miho Hirai;Shigeru Shimamura
Fumio Inagaki;Ken Takai;Hideki Kobayashi;Kenneth H. Nealson;Kenneth H. Nealson
Satoshi Nakagawa;Ken Takai;Fumio Inagaki;Hisako Hirayama
Ken Takai;Toshitaka Gamo;Urumu Tsunogai;Noriko Nakayama
Cornel E. J. de Ronde;Gary J. Massoth;David A. Butterfield;Bruce W. Christenson
Satoshi Nakagawa;Yoshihiro Takaki;Shigeru Shimamura;Anna-Louise Reysenbach
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