Harshen Ijaw
Ijaw harsuna (/idʒɔː/),  kuma ana furta kalma Ịjọ,  yare ne da mutanen Ijaw ke amfani dashi a kudancin Najeriya.

Rarrabuwa 
A al'adance ana ɗaukar yarukan Ijaw wani reshe ne daga dangin Niger-Congo (wata kila ta fito daga tsatson wata ƙungiyar da ake kira Ijoid). An sansu dangane tsarin kalmomin su na batu-abu-aikatau, wanda shi ne in ba haka ba wani sabon abu fasalin a Nijar-Congo, shared kawai da irin wannan m m rassan a matsayin Mande da kuma Dogon. Kamar Mande da Dogon, Ijoid ba shi da ko da alamun tsarin suna wanda ake ganin halaye ne irin na Nijar-Congo. Wannan ya sa Joseph Greenberg, a cikin tsarin sa na farko na Nijar-Congo, ya bayyana su da kuma cewa sun rabu da wuri daga wannan dangin. Koyaya, saboda rashin waɗannan abubuwan, masanin ilimin harshe Gerrit Dimmendaal yana shakkar sanya su cikin Nijar – Kongo kuma yana ɗaukar yarukan Ijoid a matsayin dangi mai zaman kansa. 

Waɗannan rarrabuwa na ciki ya dogara da Jenewari (1989) da Williamson & Blench (2000).

 Gabas
 Nkoroo
 Kalabari (Bonny / Ibani, Okrika / Kirike)
 Ijo kudu maso gabas
 Nembe
 Akassa
 Yamma (ko Tsakiya)
 Izon
 Inland Ijo
 Biseni
 Akita (Okordia)
 Oruma

Blench (2019) ya motsa kudu maso gabashin Ijo zuwa reshen yamma (ko Tsakiya ). 

 Gabas
 Nkoroo
 Kalabari (Bonny / Ibani, Okrika / Kirike)
 Yamma (ko Tsakiya)
 Ijo kudu maso gabas
 Nembe
 Akassa
 Izon – Inland Ijo
 Izon
 Inland Ijo
 Biseni
 Akita (Okordia)
 Oruma

Sunaye da wurare 
A ƙasa akwai jerin sunayen harshen Ijaw, yawan jama'a, da wurare daga Blench (2019).

A sauran kasashen Duniya 
Berbice Creole Dutch, tsohon yare da ake amfani dasu a Guyana, yana da ƙamus wanda ya dogara da yaren Ịjọ, wataƙila yana da alaka da Kalabari (Kouwenberg 1994).

Ilimi da kafofin watsa labarai 
A watan Yunin 2013, aka kaddamar da littafin koyar da karatun Izon Fie da faifan CD a wani bikin da ya samu halartar jami'an gwamnatin jihar Bayelsa. Jami’ar Neja Delta na kokarin fadada jerin littattafan da ake samu a yaren Ijo. Fassarorin shayari da Kiran Kogin Nun da Gabriel Okara ke gudana.

Bibiyar Tarihi 

 Freemann, RA, da Kay Williamson. 1967. Ịjọ karin magana. Bayanan Bincike (Ibadan) 1: 1-11.
 Kouwenberg, Silvia 1994. Nahawu ta Berbice Dutch Creole . (Mouton Grammar Library 12). Berlin / New York: Mouton de Gruyter.
 Lee, JD, da Kay Williamson. 1990. Leididdigar ƙamus na yarukan Ịjọ. Bincike a cikin Yarukan Afirka da Harsunan Afirka 1: 1.1-10.
 Williamson, Kay . 1963. Gajerun kalmomin aiki a cikin Ịjọ. J. Yarukan Afirka 2.150-154.
 Williamson, Kay. 1966. Ị yare yaruka a cikin Polyglotta Africana. Binciken Saliyo na Saliyo 5. 122-133.
 Williamson, Kay. 1969. 'Igbo' da 'Ịjọ', babi na 7 da 8 a cikin: Harsunan Nijeriya Goma Sha Biyu, ed. na E. Dunstan. Longmans.
 Williamson, Kay. 1971. Sunayen dabbobi a Ịjọ. Afr. Bayanan kula 6, a'a. 2, 53-61.
 Williamson, Kay. 1973. Wasu sun rage tsarin daidaita wasula. Bayanan Bincike 6: 1-3. 145-169.
 Williamson, Kay. 1977. Fasali masu yawa don baƙi. Harshe 53.843-871.
 Williamson, Kay. 1978. Daga sautin zuwa karin magana: batun Ịjọ. Kiabàrà 1: 2.116-125.
 Williamson, Kay. 1979. Rabowar baƙi a cikin Ịjọ. A cikin: Karatuttukan ilimin harshe da adabi da aka gabatar wa Archibald Hill, ed. EC Polome da W. Winter, 3.341-353. Lisse, Netherlands: Peter de Ridder Latsa.
 Williamson, Kay. 1979. Baƙi na medial a cikin Proto-Ịjọ. Jaridar Yarukan Afirka da Ilimin Harsuna 1.73-94.
 Williamson, Kay. 1987. Tsaranci a cikin Ịjọ. A cikin: Abubuwan da ke faruwa a yanzu a cikin ilimin harsunan Afirka, 4, ed. by David Odden, 397-415.
 Williamson, Kay. 1989. Sautin murya da lafazi a cikin Ịjọ. A cikin tsarin karin lafazi, ed. na Harry vd Hulst da Norval Smith, 253-278. Littattafan Foris.
 Williamson, Kay. 2004. Yanayin yare a yankin Niger Delta. Fasali na 2 a cikin: Ci gaban yaren Ịaz, wanda Martha L. Akpana ta shirya, 9-13.
 Williamson, Kay, da AO Timitimi. 1970. Bayani kan alamar lamba a cikin Ịjọ. Bayanan Afirka (Ibadan) 5: 3. 9-16.
 Williamson, Kay & Lokaci, AO (197? ) 'Bayani akan alamar lambar Ijo', Bayanan Afirka, 5, 3, 9-16.
 Filatei, Akpodigha. 2006. Aikin Harshen Ijaw. (Editan www.ijawdictionary.com). www.ijawdictionary.com

 Akan takamaiman harsuna

 Williamson, Kay. 1962. (Sake buga ta Bobbs-Merrill Sake bugawa 1971. ). Canje-canje a tsarin aure na Okrika Ịjọ. Afirka 32.53-60.
 Orupabo, GJ, da Kay Williamson. 1980. Okrika. A cikin takardun bayanan harshen Afirka ta Yamma, Volume II, wanda ME Kropp Dakubu ya shirya. Leiden: Lungiyar Harshen Afirka ta Yamma da Cibiyar Nazarin Afirka.

Manazarta 
Harsunan Nijeriya
Al'adun Najeriya
Al'ummomin Nijeriya
Al'ada