The 23-year-old striker joins Caykur Rizespor with five-year experience playing in the Super Lig and will stay with The Black Sea Sparrowhawk until the end of the 2018/19 season.
Super Eagles striker joins Caykur Rizespor on loan
Aminu Umar has joined Turkish Super Lig newcomers Caykur Rizespor on loan till the end of the season.
Caykur Rizespor are a newly promoted team to the Turkish top flight after they finished top of the second division.
Umar is expected to compete forwards Oğulcan Çağlayan, Yasin Yavuz and captain Léonard Kweuke from Cameroon for the starting attacking spots.
His experience in Turkey includes playing for Samsunspor when he spent a season and a half before he completed a switch to Osmanlispor in 2015.
Umar is remembered for his exploits with the Dream Team VI to the football event of the 2016 Olympic Games where Nigeria claimed a bronze medal.
A statement on Çaykur Rizespor reads, "Çaykur Rizespor reached an agreement with Aminu Umar from Osmanlıspor.
"We have reached an agreement with Nigerian striker Aminu Umar, who is 23 years old, in the last season's Sports Super League teams in Osmanlıspor as a lease for 1 year.
"We say to Aminu Umar that the club welcomes you, we wish you success."
He scored two goals in at the Rio Olympics and was the top scorer with the at the 2013 U-20 African Cup of Nations.
He played in the Nigerian Professional Football League with Wikki Tourists and featured for grassroots sides Optimum Performance FC Abuja.
Umar made his debut for the Super Eagles in 2016 and has a total of four appearances and his yet to register a goal for the national team.