Following are cetacean which are considered as inhabitant of Japanese coastal water.

inside of round bracket is Japanese name

Baleen whales
(higekujira)

right whales
(semikujira ka)

bow head whale (hokkyoku kujira) / right whale (semi kujira) / pigmyrightwhale (kosemi kujira)

gray whale
(koku kujira ka)

gray whale (koku kujira)

rorqual whales
(nagasu kujira ka)

blue whale (sironagasu kujira) / fin whale (nagasu kujira) / sei whale (iwasi kujira) / Bryde’s whale (nitari kujira) / minke whale (minku kujira) / humpback whale (zato kujira)

Toothed Whales
Toothed Whales(hakujira)

porpoises
(nezumiiruka ka)

harbour porpoise (nezumi iruka) / finless porpoise (sunameri) / Dall’s porpoise (ishi iruka)

oceanic dolphins
(mairuka ka)

roughtoothed (siwahairuka) / bottlenose (handou iruka) / striped (suji iruka) / pantropical spotted (madara iruka) / northern right whale dolphin (semi iruka) / common (mairuka) / long-beaked common (hase iruka) / Fraser’s (Sarawak iruka) / pacific white-sided (kama iruka) / melon-headed whale (kazuha gondo) / pygmy killer whale (yume gondo) / false killer whale (oki gondo) / orca - killer whale (shachi) / lomfinnedpilotwhale (hirenaga gondo) / short-finned pilot whale  (kobire gondo) / Risso’s dolphin (hana gondo)

beaked whales
(akabo kujira ka )

Cuvier’s beaked whale (akabo kujira) / Baird’s beaked (tuchi kujira) / Stejneger’s beaked (ohgi hakujira) / Hubbs’ (habbus ohgi hakujira) / Blainville’s (kobuhakujira) / ginkgo-Toothed (ichou hakujira)

Sperm whale (makko kujira ka)

sperm whale (makkou) / Pygmysperm (komakko) / dwarf (ogawamak ko)

Name of whales without link are under construction. Coming soon.

Reference:

• About Rare Aquatic Life in Japanese Water' National Fisheries Agency
• 'Red List of Japanese Mammals' Mammalogical Societyof Japan
• 'Whales and Dolphins' Anthony R. Martin
• 'Whales, Dolphins and Porpoise' mark Carwardine
• 'Killer Whales' Ford/Ellis/Balcomb