KAZUHIKO KOIKE

Last Updated :2025/07/07

Affiliations, Positions
Graduate School of Integrated Sciences for Life, Professor
Web Site
http://home.hiroshima-u.ac.jp/gsbstop/interview/en/koike.html
E-mail
kazkoikehiroshima-u.ac.jp
Other Contact Details
1-4-4，Kagamiyama，Higashi-Hiroshima, Japan
TEL : (+81)82-424-7996 FAX : (+81)82-424-7916
Self-introduction
Recently, substantial changes are occurring in the seas and/or coasts around the world. By visiting the sites of changes and through researching the extensive environmental changes from the view point of microorganisms, especially, phytoplankton or microalgae which are foundation of the all marine ecosystems, sustainable management of the environments have been pursued.

Basic Information

Major Professional Backgrounds

  • 2007/01/01, 2016/03/31, Hiroshima University, Graduate School of Biosphere Science, Associate Professor
  • 1994/04/01, 2006/12/31, Kitasato University, School of Fisheries Sciences, Associate Professor

Educational Backgrounds

  • Tokyo University of Fisheries, Graduate School, Division of Fisheries, Japan, 1993/04, 1994/03
  • Tokyo University of Fisheries, Faculty of Fisheries, Japan, 1985/04, 1990/03

Academic Degrees

  • Doctor of Philosophy, Tokyo University of Fisheries
  • Master, Tokyo University of Fisheries

Educational Activity

  • [Bachelor Degree Program] School of Applied Biological Science : Department of Applied Biological Science : Integrative Hydrospheric Science Program
  • [Master's Program] Graduate School of Innovation and Practice for Smart Society
  • [Master's Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Bioresource Science
  • [Doctoral Program] Graduate School of Innovation and Practice for Smart Society
  • [Doctoral Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Bioresource Science

In Charge of Primary Major Programs

  • Integrative Hydrospheric Science Program

Research Fields

  • Agricultural sciences;Applied aquatic science;Aquatic bioproduction science

Research Keywords

  • Ballast water
  • zooxanthella
  • Phytoplankton
  • Ocean primary production
  • Coral reefs
  • Harmful algae
  • Symbiosis in marine organisms
  • Restoration of coastal fisheries
  • Microalgae
  • Photosynthesis

Affiliated Academic Societies

  • Japanese Society of Coral reef Sciences, 2006
  • Japanese Planktological Society, 1999
  • Japanese society of fisheries sciences, 1988
  • Japanese Phycological Society, 2005

Educational Activity

Course in Charge

  1. 2025, Graduate Education (Master's Program) , 2Term, Exercises in Bioresource Science A
  2. 2025, Graduate Education (Master's Program) , 3Term, Exercises in Bioresource ScienceB
  3. 2025, Graduate Education (Master's Program) , 4Term, Exercises in Bioresource ScienceB
  4. 2025, Graduate Education (Master's Program) , Year, Research for Academic Degree Dissertation in Bioresource Science
  5. 2025, Liberal Arts Education Program1, Intensive, Introduction to Overseas Dispatch and Study Abroad
  6. 2025, Liberal Arts Education Program1, Intensive, Introduction to Overseas Dispatch and Study Abroad
  7. 2025, Undergraduate Education, First Semester, Special intensive course on Inclusive Asia
  8. 2025, Graduate Education (Master's Program) , 3Term, Academic approach to SDGs - B
  9. 2025, Graduate Education (Doctoral Program) , 2Term, SDGs Ideas Mining Seminar for Specialists
  10. 2025, Undergraduate Education, 3Term, Research Front of Bioresource Science
  11. 2025, Undergraduate Education, 2Term, Hydrospheric Primary ProductionII
  12. 2025, Undergraduate Education, Intensive, Laboratory Work in Hydrospheric BiologyI
  13. 2025, Undergraduate Education, 1Term, Exercises in Integrative Hydrospheric ScienceII
  14. 2025, Undergraduate Education, Second Semester, Graduation Thesis I
  15. 2025, Undergraduate Education, First Semester, Graduation Thesis II
  16. 2025, Undergraduate Education, Second Semester, Graduation Thesis III
  17. 2025, Undergraduate Education, Intensive, On demand research cruise for a Blue Growth concept
  18. 2025, Undergraduate Education, Intensive, On-voyage seminar for international-mind students under the topics of hunger and poverty
  19. 2025, Undergraduate Education, First Semester, Graduate Thesis I
  20. 2025, Undergraduate Education, Second Semester, Graduate Thesis II
  21. 2025, Undergraduate Education, Intensive, (AIMS)Plankton Biology
  22. 2025, Undergraduate Education, Intensive, Plankton Biology
  23. 2025, Graduate Education (Master's Program) , 1Term, Exercises in Bioresource Science A

Research Activities

Academic Papers

  1. High light stress under phosphorus limitation in summer may accelerate diatom shift from Skeletonema to Chaetoceros in an oligotrophic coastal area of Japan, FRONTIERS IN MARINE SCIENCE, 10, 20230217
    Link to Paper Search Results by DOI
  2. Metabolic inhibitor induces dynamic changes in saxitoxin biosynthesis and metabolism in the dinoflagellate Alexandriumpacificum (Group IV) under in vivo labeling condition, HARMFUL ALGAE, 122, 202302
    Link to Paper Search Results by DOI
  3. SxtA localizes to chloroplasts and changes to its 3 ' UTR may reduce toxin biosynthesis in non-toxic Alexandrium catenella (Group I), HARMFUL ALGAE, 101, 202101
    Link to Paper Search Results by DOI
  4. Symbiodiniacean cell supply method for improvement in survival of Tridacna squamosa seeds, NIPPON SUISAN GAKKAISHI, 87(2), 123-131, 202101
    Link to Paper Search Results by DOI
  5. Can Acropora tenuis larvae attract native Symbiodiniaceae cells by green fluorescence at the initial establishment of symbiosis?, PLoS ONE, 16(6), e0252514., 202106
    Link to Paper Search Results by DOI
  6. Effects of water temperature, light and nitrate on the growth of sporelings of the non-geniculate coralline alga Lithophyllum okamurae (Corallinales, Rhodophyta), JOURNAL OF APPLIED PHYCOLOGY, 32(3), 1923-1931, 202006
    Link to Paper Search Results by DOI
  7. ★, Fecal pellets of giant clams as a route for transporting Symbiodiniaceae to corals, PLOS ONE, 15(12), 202012
    Link to Paper Search Results by DOI
  8. ★, Environmental and seasonal dynamics altering the primary productivity in Bingo-Nada (Bingo Sound) of the Seto Inland Sea, Japan, PLANKTON & BENTHOS RESEARCH, 15(2), 78-96, 202005
    Link to Paper Search Results by DOI
  9. ★, Study on expelled but viable zooxanthellae from giant clams, with an emphasis on their potential as subsequent symbiont sources, PLOS ONE, 14(7), 20190719
    Link to Paper Search Results by DOI
  10. Preliminary Physiological Study on the Edible Wild Bivalves in Myeik, Myanmar, Asian Fisheries Science, 32, 81-87, 2019
    Link to Paper Search Results by DOI
  11. Metabolomic study of saxitoxin analogues and biosynthetic intermediates in dinoflagellates using N-15-labelled sodium nitrate as a nitrogen source, SCIENTIFIC REPORTS, 9, 20190305
    Link to Paper Search Results by DOI
  12. Cryptic occurrence of Chattonella marina var. marina in mangrove sediments in Probolinggo, East Java Province, Indonesia, FISHERIES SCIENCE, 84(5), 877-887, 201809
    Link to Paper Search Results by DOI
  13. Evaluation of Chlorophyll-a Estimation Approaches Using Iterative Stepwise Elimination Partial Least Squares (ISE-PLS) Regression and Several Traditional Algorithms from Field Hyperspectral Measurements in the Seto Inland Sea, Japan, SENSORS, 18(8), 201808
    Link to Paper Search Results by DOI
  14. ★, Cryptic occurrence of Chattonella marina var. marina in mangrove sediments in Probolinggo, East Java Province, Indonesia, Fisheries Science, 84(5), 877-887, 20180618
  15. Symbiosis process between Acropora larvae and Symbiodinium differs even among closely related Symbiodinium types, MARINE ECOLOGY PROGRESS SERIES, 592, 119-128, 20180329
    Link to Paper Search Results by DOI
  16. Species composition of hairtails (Trichiuridae) in Myanmar, REGIONAL STUDIES IN MARINE SCIENCE, 17, 73-77, 201801
    Link to Paper Search Results by DOI
  17. Pentaplacodinium saltonense gen. et sp nov (Dinophyceae) and its relationship to the cyst-defined genus Operculodinium and yessotoxin-producing Protoceratium reticulatum, HARMFUL ALGAE, 71, 57-77, 201801
    Link to Paper Search Results by DOI
  18. Palynomorph Assemblages Dominated by Heterotrophic Marine Palynomorphs in Tropical Coastal Shallow-water Sediments from the Southern Myanmar Coast, JARQ-JAPAN AGRICULTURAL RESEARCH QUARTERLY, 52(1), 77-89, 2018
  19. Evaluation of Chlorophyll-a Estimation Approaches Using Iterative Stepwise Elimination Partial Least Squares (ISE-PLS) Regression and Several Traditional Algorithms from Field Hyperspectral Measurements in the Seto Inland Sea, Japan., Sensors (Basel), 18(8), doi:10.3390/s18082656, 2018
  20. Seasonal dynamics influencing coastal primary production and phytoplankton communities along the southern Myanmar coast, Journal of Oceanography, 73, 345-364, 201706
  21. Bothrosome Formation in Schizochytrium aggregatum (Labyrinthulomycetes, Stramenopiles) during Zoospore Settlement, Protist, 168(2), 206-219, 201704
  22. Zooxanthellal genetic varieties in giant clams are partially determined by species-intrinsic and growth-related characteristics, PLOS ONE, 12(2), 20170217
    Link to Paper Search Results by DOI
  23. Mortality factors of cultured bluefin tuna Thunnus orientalis in the coastal area of Tsushima, Nagasaki Prefecture, Japan, NIPPON SUISAN GAKKAISHI, 83(1), 41-51, 201701
    Link to Paper Search Results by DOI
  24. Application of a pulse-amplitude-modulation (PAM) fluorometer reveals its usefulness and robustness in the prediction of Karenia mikimotoi blooms: A case study in Sasebo Bay, Nagasaki, Japan, HARMFUL ALGAE, 61, 63-70, 2017
    Link to Paper Search Results by DOI
  25. Motility and cell division patterns among several strains of Symbiodinium, Galaxea, 18, 1-7, 2016
  26. A simple and rapid determination method for zooxanthellal genetic diversity in giant clams using multiplex PCR, FISHERIES SCIENCE, 82(5), 747-753, 2016
    Link to Paper Search Results by DOI
  27. Possible involvement of Tachylectin-2-like lectin from Acropora tenuis in the process of Symbiodinium acquisition, FISHERIES SCIENCE, 81(3), 473-483, 2015
    Link to Paper Search Results by DOI
  28. Application of calcofluor staining to identify motile and coccoid stages of Symbiodinium (Dinophyceae), FISHERIES SCIENCE, 80(2), 363-368, 2014
    Link to Paper Search Results by DOI
  29. Establishment of Coral-Algal Symbiosis Requires Attraction and Selection, PLOS ONE, 9(5), 2014
    Link to Paper Search Results by DOI
  30. Explusion of zooanthellae (Symbiodinium) from several species of scleractinian corals; comparison under non-stress conditions and thermal stress conditions, Galaxea, 15, 41647, 2014
    Link to Paper Search Results by DOI
  31. ★, Moderate Thermal Stress Causes Active and Immediate Expulsion of Photosynthetically Damaged Zooxanthellae (Symbiodinium) from Corals, PLOS ONE, 9(12), 2014
    Link to Paper Search Results by DOI
  32. ★, Genetic identity of free-living Symbiodinium obtained over a broad latitudinal range in the Japanese coast, PHYCOLOGICAL RESEARCH, 61, 68-80, 2013
    Link to Paper Search Results by DOI
  33. ★, Acropora recruits harbor rare" Symbiodinium in the environmental pool", CORAL REEFS, 32(2), 355-366, 2013
    Link to Paper Search Results by DOI
  34. ★, A red tide off the Myanmar coast: Morphological and genetic identification of the dinoflagellate composition, HARMFUL ALGAE, 27, 149-158, 2013
    Link to Paper Search Results by DOI
  35. Possible involvement of glycolipids in lectin-mediated cellular transformation of symbiotic microalgae in corals, JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY, 439, 129-135, 2013
    Link to Paper Search Results by DOI
  36. Chlorophyll-a estimation in Tachibana Bay by data fusion of GOCI and MODIS using liner combination index algorithm, Advance in Remote Sensing, 2, 292-296, 2013
  37. Chlorophycean parasite on a marine fish, Sillago japonica (Japanese sillago), PARASITOLOGY INTERNATIONAL, 62(6), 586-589, 2013
  38. Autofluorescent bodies in the toxic dinoflagellate Alexandrium tamarense: A potential indicator of the physiological condition of the species, Coastal Marine Science, 35, 255-261, 2012
  39. PROBABILITY OF SYMBIOSIS ESTABLISHMENT BY GIANT CLAMS WITH FRESH AND CULTURED SYMBIODINIUM ISOLATED FROM VARIOUS HOST ANIMALS, JOURNAL OF SHELLFISH RESEARCH, 31(4), 977-987, 2012
    Link to Paper Search Results by DOI
  40. Mechanisms of Maternal Inheritance of Dinoflagellate Symbionts in the Acoelomorph Worm Waminoa litus, ZOOLOGICAL SCIENCE, 29(9), 559-567, 2012
  41. ★, Phytoplankton surveys off the southern Myanmar coast of the Andaman Sea: an emphasis on dinoflagellates including potentially harmful species, FISHERIES SCIENCE, 78(5), 1091-1106, 2012
  42. ★, Cyanobacterial Endosymbionts in the Benthic Dinoflagellate Sinophysis canaliculata (Dinophysiales, Dinophyceae), PROTIST, 162(2), 304-314, 2011
  43. ★, Do corals select zooxanthellae by alternative discharge?, MARINE BIOLOGY, 158(1), 87-100, 2011
  44. Effects of lectin in the scleractinian coral Ctenactis echinata on symbiotic zooxanthellae, Fisheries Science, 76, 355-363, 2010
  45. ★, Do Uric Acid Deposits in Zooxanthellae Function as Eye-Spots?, PLOS ONE, 4(7), 20090717
    Link to Paper Search Results by DOI
  46. Symbionts of marine medusae and ctenophores, Plankton and Benthos Research, 4(1), 1-13, 2009
  47. Cellular origin of dysiherbaine, an excitatory amino acid derived from a marine sponge, CHEMBIOCHEM, 9(4), 543-551, 20080303
    Link to Paper Search Results by DOI
  48. ★, Anucleated cryptophyte vestiges in the gonyaulacalean dinoflagellates Amylax buxus and Amylax triacantha (Dinophyceae), PHYCOLOGICAL RESEARCH, 56(4), 301-311, 2008
  49. Yessotoxin analogues in several strains of Protoceratium reticulatum in Japan determined by liquid chromatography-hybrid triple quadrupole/linear ion trap mass spectrometry., J. Chromatogr. A, 1142(2), 172-177, 2007
  50. A quantitative real-time PCR method for monitoring Symbiodinium in the water column, J Jpn Coral Reef Soc, 9(1), 1-12, 2007
  51. ★, Appearance of Dinophysis fortii following blooms of certain cryptophyte species, MARINE ECOLOGY PROGRESS SERIES, 337, 303-309, 2007
  52. ★, Mechanism of gamete fusion in Dinophysis fortii (Dinophyceae, Dinophyta): light microscopic and ultrastructural observations., J. Phycol., 42, 1247-1256, 2006
  53. ★, Protoceratium reticulatum in northern Japan: environmental factors associated with seasonal occurrence and related contamination of yessotoxin in scallops., J. Planton Res., 28, 103-112, 2006
  54. Screening of diatoms producing domoic acid and its derivatives in the Philippines, Coastal marine science, 30(1), 121-129, 2006
  55. New stage of the study on domoic acid-producing diatoms : A finding of Nitzschia navis-varingica that produces domoic acid derivatives as major toxin components, Coastal marine science, 30(1), 116-120, 2006
  56. ★, A novel type of kleptoplastidy in Dinophysis (Dinophceae): presence of haptophyte-type plastid in Dinophysis mitra, Protist, 156, 225-237, 2005
  57. Cellular and subcellular localization of kainic acid in the marine red alga Digenea simplex., Cell and Tissue Research, 322, 491-502, 2005
  58. Confirmation of yessotoxin production by the dinoflagellate, Protoceratium reticulatum, in Mutsu Bay, Fish. Sci., 71, 633-638, 2005
  59. Development of molecular probes for Dinophysis (Dinophyceae) plastid: a tool to predict their blooming and to explore their plastid origin., Mar. Biotechnol., 7, 95-103, 2005
  60. Cloning and characterization of a lectin from the octocoral Sinularia lochmodes., Biochem. Biophysic. Res. Commun. (BBRC), 330, 157-162, 2005
  61. Differences in expression patterns of photosynthetic genes in the dinoflagellate Alexandrium tamarense, Europ. J. Protistol., 41, 277-286, 2005
  62. ★, Octocoral chemical signalling selects and controls dinoflagellate symbionts., Biological Bulletin, 207, 80-86, 2004
  63. Comparison of phylogenies based on nuclear- encoded SSU rDNA and plastid-encoded psbA in the symbiotic dinoflagellate genus Symbiodinium., Phycologia, 42, 285-291, 2003
  64. ★, Molecular evidence for plastid robbery (kleptoplastidy) in Dinophysis, a dinoflagellate causing diarrhetic shellfish poisoning., Protist, 153, 293-302, 2002
  65. Mixotrophy of DMinophysis fortii: A strategy for growth in various environmental conditions (Proceedings of International Commemorative Symposium--70th Anniversary of The Japanese Society of Fisheries Science), Fisheries Science, 68(0), 529-532, 2002
  66. Mixotrophy of Dinophysis fortii: A strategy for growth in various environmental conditions, Fisheries science, 68(1), 529-532, 2002
  67. Recent occurrences of Dinophysis fortii (Dinophyceae) in the Okkirai Bay, Sanriku, northern Japan, and related environmental factors., Journal of Oceanography, 57, 166-175, 2001
  68. The D-galactose-binding lectin of the octocoral Sinularia lochmodes: characterization and possible relationship to the symbiotic dinoflagellates., Comp. Biochem. Physiol. Part B, 125, 227-236, 2000
  69. Evidence of phagotrophy in Dinophysis fortii (Dinophysiales, Dinophyceae), a dinoflagellate that causes diarrhetic shellfish poisoning (DSP)., Phycological Research, 48, 12-124, 2000
  70. Domoic acid production in Nitzschia sp. (Bacillariophyceae) isolated from a shrimp-culture pond in Do Son, Vietnam, Journal of Phycology, 36, 1057-1060, 2000
  71. Confirmation of domoic acid production of Pseudo-nitzschia multiseries isolated from Ofunato Bay, Japan., Toxicon, 37, 677-682, 1999
  72. Occurrence of okadaic acid-producing Prorocentrum lima on the Sanriku Coast, Northern Japan., Toxicon, 36, 2039-2042, 1998
  73. A simple integrating- sphere- fluorometer for monitoring the growth of benthic microalgae, La mer., 32(1), 45-50, 1994
  74. Distributions of Benthic Dinoflagellates in Akajima Island,Okinawa, Japan., NSUGAF, 57(12), 2261-2264, 1991

Publications such as books

  1. 2016/02/10, Advance in Harmful Algal Bloom Research, Japanese, 2016, 2, Scholarly Book, Joint work, J, 9784769915805, 352, 352
  2. 2015, Marine Protists, Biology of Symbiotic Dinoflagellates ( Symbiodinium ) in Corals., Springer, 2015, Scholarly Book, Joint work, E, Yamashita H, Koike K, 978-4-431-55130-0
  3. 2008/04, Animal Lectins: A Functional View, Roles of coral lectins in the regulation of symbiotic zooxanthella, CRC Press, 2008, 4, Scholarly Book, Joint work, 英語, Kamiya H, Jimbo M, Koike K, Sakai R., 9.78E+12, 596, 231-238

Awards

  1. 2004/06, Fritz Schaudinn Award, Protist, Molecular evidence for plastid robbery (kleptoplastidy) in Dinophysis, a dinoflagellate causing diarrhetic shellfish poisoning.
  2. 2018/06/01, 2nd Place in the Poster Competition of the 36th Symposium and Annual Meeting of the Association of Systematic Biologists of the Philippines, Convention Chair・President of ASBP

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI(Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))), 2020, 2023
  2. KAKENHI(Grant-in-Aid for Challenging Research (Exploratory)), 2020, 2021
  3. KAKENHI(Grant-in-Aid for Challenging Research (Exploratory)), 2018, 2019
  4. 2018, 2019
  5. KAKENHI(Grant-in-Aid for Scientific Research (B)), 2017, 2019
  6. 2009
  7. KAKENHI, 2014, 2016
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  8. KAKENHI, 2012, 2014
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  9. KAKENHI, Zooxanthellal cycle in coral reefs, 2009, 2011
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  10. KAKENHI, A reexamination of the taxonomical study of the genus Skeletonema and their spatial and temporal distribution in Japan, 2009, 2011
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  11. KAKENHI, Studies on life cycles of aquatic parasites, in particular, host-specificities of their infective stages, 2008, 2012
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  12. KAKENHI, Appearance of causative dinoflagellates for diarrheatic shellfish poisoning following the blooms of certain cryptophyte species, 2005, 2007
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  13. KAKENHI, Sponge-derived neurotoxic substances : Structure, Bioactivity, and their cellular localization., 2005, 2007
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  14. KAKENHI, Selection and Morphological Alteration of dinoflagellates symbionts by chemical substances in marine invertebrates, 2003, 2005
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  15. KAKENHI, Biochemical investigations on the cells that localizes dysiherbaine in marine sponge Dysidea herbacea., 2003, 2004
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  16. KAKENHI, Growth and toxin production of paralytic shellfish toxin producing dinoflagellate in relation with adaptation mechanism to nutritional environment., 2002, 2004
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  17. KAKENHI, 2002, 2004
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  18. KAKENHI, CELLULAR LOCALIZATION OF MARINE-DERIVED EXCITATORY AMINO ACIDS IN THEIR PRODUCING ORGANISMS, 2001, 2002
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  19. KAKENHI, 2001, 2002
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  20. KAKENHI, Structure and Function of the Octocoral Sinularia lochmodes lectin, 2000, 2002
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  21. KAKENHI, 2000, 2001
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  22. KAKENHI, 1997, 1998
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  23. KAKENHI, Properties of soft-coral lectins and their possible roles in symbiosis., 1997, 1998
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  24. KAKENHI, Red Tides and Their Environmental Impacts in WESTPAC Area, 1994, 1995
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Social Activities

Organizing Academic Conferences, etc.

  1. 2014/, 2014/