- Habesolatia nodulifera
- Hackberry
- hadai, Spiroloculina
- Haeckelicyrtium breviora
- haiburnensis, Cladophlebis
- hakodatensis, Astarte
- hakodatensis, Limaria
- hakonensis, Tribolodon
- hakusanensis, Gleichenites
- Halamphora veneta
- haliarchus, Calliostoma
- haliarchus, Trostichotrochus
- halicora, Favites
- Haliotis, genus
- Haliotis discus subsp. hannai
- Haliotis japonica
- Haliotis kamtschatkana subsp. koyamai
- Haliotis notoensis
- Haliotis tuberculata subsp. tuberculata
- Hallatia, genus
- Halobia, genus
- Halobia kawadai
- Haloragaceae, family
- Halosaur
- Halosauridae, family
- Halysites, genus
- Halysites kuraokensis
- Hamamelis, genus
- Hamamelis japonica
- Hamamelis japonica var. megaphylla
- Hamamelis japonica ssp. obtusata
- Hamamelis parrotioides
- hamanakense, Gaudryceras
- Hamites haradanum
- Hamites (Polyptychoceras) haradanum
- Hammatoceras, genus
- Hammerhead shark
- hanaizumiensis, Bison
- hanaizumiensis, Leptobison
- Hanleyanus vestalioides
- hannai, Haliotis discus
- hannibali, Lucinoma
- hantzschii, Stephanodiscus
- Hanzawaia nipponica
- hanzawai, Carditella
- hanzawai, Elphidium
- hanzawai, Stylocoeniella
- Haplophragmoides, genus
- Haptophyceae, class
- Haptophyta
- haradae, Bakevellia
- haradae, Gervillaria
- haradai, Eupachydiscus
- haradai, Hollandites
- haradanum, Polyptychoceras
- hardmanianus, Stictodiscus
- Hardy kiwi
- Hare
- Harpoceras, genus
- harrimani, Papyridea
- harutoriensis, Ulmus
- hasimotoi, Durhamina
- hastalis, Carcharodon
- hastalis, Cosmopolitodus
- hastalis, Isurus
- hataii, Aequipecten
- hataii, Anadara
- hataii, Aviculopecten
- hataii, Calliostoma
- hataii, Calyptraea
- hataii, Chlamys
- hataii, Dosinia
- hataii, Phacosoma
- hatai, Isognomon
- hataii, Utatsusaurus
- Hataiyoldia tokunagai
- Hataiyoldia tokunagai var. hayasakai
- Hauericeras augustum
- Hauerina fragilissima
- Hausmannia dentata
- Hausmannia nariwaensis
- Haustator andenensis
- Haustator nipponica
- Hawaiarca, genus
- Hawthorn-leaf maple
- hayakawai, Astraea
- hayamii, Permoperna
- hayamii, Waagenoperna
- Hayamina, genus
- Hayamina naumanni
- hayasakai, Acilana tokunagai
- hayasakai, Cleiothyridina
- hayasakai, Hataiyoldia tokunagai
- hayasakai, Megayoldia tokunagai
- hayasakai, Mourlonia
- hayasakai, Portlandia tokunagai
- Hayasakapecten, genus
- hayashii, Protorotella
- hayatae, Fagus
- Hazel
- Heart cockle
- Heath
- Heather
- hebetata, Rhizosolenia
- Hedera, genus
- hegiensis hegiensis, Minetrigonia
- hegiensis, Minetrigonia
- hegiensis, Minetrigonia hegiensis
- heigunensis, Carpinus
- Heikeopsis, genus
- Helcion, genus
- Helcion gigantea
- helianthoides, Dactylioceras
- Helice, genus
- Helicoprion, genus
- Helicoprion bessonowi
- Heliocidaris, genus
- Heliolites, genus
- Heliolites bohemicus
- Heliolites fukujiensis
- Heliopora, genus
- Helminthochiton, genus
- helvetica, Melosira islandica
- Hemibarbus, genus
- Hemicentrotus, genus
- Hemicentrotus pulcherrimus
- Hemiculter, genus
- Hemidiscus cuneiformis
- Hemifusus, genus
- Hemigrapsus, genus
- hemionus, Equus
- Hemiprionites, genus
- Hemiprionites sawatanus
- Hemipristis, genus
- Hemipristis serra
- Hemithiris psittacea var. woodwardi
- Hemithiris woodwardi
- Hemithyris woodwardi
- Hemitrapa borealis
- Hemitrapa hokkaidoensis
- Hemitrapa yokoyamae
- hemprichii, Acanthastrea
- Hemprich's brain coral
- Hepaticites, genus
- Heptageniidae, family
- Hermanites posterocostatus
- Heron
- Hesperornis, genus
- Hestina, genus
- Heteraster hiranamensis
- Heteraster macroholcus
- Heteraster nexilis
- Heterocarinia, genus
- Heteroclidus pulchella
- Heterocrinidae, family
- Heterocyathus aequicostatus
- Heterocyathus japonicus
- Heterodontus, genus
- Heterodontus japonicus
- Heterogen, genus
- heteroglypta, Chlamys cosibensis
- heterograna, Lyphira
- heterograna, Philyra
- Heterolepa dutemplei
- Heteromacoma, genus
- heterophylla, Corylus
- heterophylla var. thunbergii, Corylus
- heterophyllus, Osmanthus
- heterophyllus, Ptamogeton gramineus
- Heteropsammia cochlea
- Heteropsammia ovalis
- Heteropsammia ovalis var. japonica
- Heteroptera, suborder
- Heterotrigonia, genus
- Hexacontium, genus
- Hexacorallia, subclass
- hexagonum, Dentalium
- hexagonum, Dentalium octangulatum
- hexagonum, Paradentalium
- Hexanchus, genus
- Hexaphyllia, genus
- Hexapinus, genus
- Hexapus, genus
- Hiatella, genus
- Hiatula, genus
- Hiatula boeddinghausi
- Hiatula minoensis
- Hiba arborvitae
- Hibiscus syriacus
- Hickory
- Hidaella kameii
- hidakaensis, Adiozoptyxis
- hidense, Michelinoceras
- hidense, Plerophyllum
- hidensis, Favosites
- Higher termite
- hilgendorfi, Amalda
- hilgendorfi, Odostomia
- Hindsia magnifica
- Hinedorcus alatus
- hinomotoensis, Amalda
- hinomotoensis subsp. urasima, Amalda
- Hippurites, genus
- Hippuritida, order
- Hippuritoida, order
- hiradoensis, Duplicaria
- hiranamensis, Heteraster
- hiranitensis, Chlorostoma
- hiranitensis, Tegula
- hirasei var. awajiensis, Volachlamys
- hirasei, Ginebis argenteonitens
- hirasei noguchii, Fulgoraria
- hirasei, Volachlamys
- hiratai, Anadara
- hiratai, Mabellarca
- hiratai, Scapharca
- hirsuta, Alnus
- hirsuta f. sibirica, Alnus
- hirta, Hydrangea
- Hiscocapsa robusta
- hishinaiensis, Eosardinella
- hispidus, Pterostyrax
- hizenense, Cardium
- hizenensis, Nucula
- hobetsuensis, Inoceramus
- hodophilax, Canis lupus
- Hodotermopsis iwatensis
- hoerensis, Neocalamites
- hoheneggeri, Frenelopsis
- hokkaidoana, Pterotrigonia
- hokkaidoensis, Acila
- hokkaidoensis, Hemitrapa
- Hokkaido sika deer
- hokurikuensis, Mizuhopecten
- hokurikuensis, Mizuhopecten tokyoensis
- hokurikuensis, Patinopecten
- hokurikuensis, Patinopecten tokyoensis
- Holasteroid
- Holasteroida, order
- Holcophylloceras, genus
- Hollandites haradai
- Hollandites japonicus
- Hollandites japonicus crassicostatus
- Holly
- Holly-fern woodsia
- Holly osmanthus
- Homalopoma amussitatum
- Homalopoma granuliferum
- Homalopoma sangarense
- hommashinichii, Betula
- hommashinichii, Tilia
- homolepis, Abies
- Homo sapiens
- hondoensis, Picea jezoensis
- Honeysuckle
- honshuense, Acer
- honsyuensis, Liriodendron
- honsyuensis, Terebratulina
- Hood coral
- Hooked tooth white shark
- Hoploscaphites, genus
- horinjiense, Bittium
- horinjiense, Neostylidium
- horinjiense, Stylidium
- Hornbeam
- Horn coral
- Horned maple
- Horntail
- Hornwort
- horrida, Gleditschia
- Horse clam
- Horse-fly
- Horsemussel
- Horseshoe bat
- Horsetail
- hosenjiana, Juglans mandshurica
- hosenjiana, Juglans sieboldiana
- Hozmadia gifuensis
- Huangia, genus
- Huangia mizuyagadaniensis
- hughesi, Diartus
- hughesi, Ommatartus
- hukusimensis matumori, Neptunea
- hukusimensis, Neptunea
- Humulus japonicus
- Humulus scandens
- hungerfordi, Fulvia
- hungerfordi hungerfordi, Paradusta
- hungerfordi, Paradusta hungerfordi
- Huperzia serrata
- Hustedia, genus
- hustedtii, Denticula
- hustedtii, Denticulopsis
- huttoni, Ginkgoites
- huttoni, Ginkgoites digitata
- huttonii, Ginkgoites
- huziokae, Acer
- huziokai, Trachycarcinus
- huziokai, Trichopeltarion
- Hyalonema, genus
- Hydrangea, genus
- Hydrangea hirta
- Hydrangea paniculata
- Hydrangea petiolaris
- hydrangeoides, Schizophragma
- Hydrochara, genus
- Hydrodamalis, genus
- Hydrozoa, class
- Hydrozoan
- Hymeniastrum, genus
- Hymenocephalus, genus
- Hymenodiscus, genus
- Hymenoptera, order
- Hyotissa inermis
- Hypacanthoplites spathi.htm
- Hyperpuzosia tamon
- Hyphantoceras orientale
- Hypoatherina, genus
- hypohippoides, Anchitherium
- Hypophylloceras (Neophylloceras), subgenus
- Hypophylloceras (Neophylloceras) subramosum
- Hypophylloceras subramosum
- Hypoturrilites komotai
- Hypsilophodon, family
- Hyriopsis, genus