Only a work permit and visa delays have been holding up the transfer but they have now been resolved.
The 24-year-old full back has been playing his football at Israeli side FC Ashdod.
Oshaniwa claimed at the start of June that he was attracting interest from several clubs in the UK, including Celtic and Sheffield Wednesday, and mentioned then that Scottish club Hearts were in discussions to acquire him.
Oshaniwa played in all four of Nigeria’s World Cup matches in Brazil in 2014, including a thrilling 3-2 defeat to eventual runners-up Argentina.
He joined Ashdod in 2012 and stated on June 4 that he was keen to leave the club in the summer in a bid to continue his football development.
He said: “I will be so glad to leave for greener pastures to meet up with my goal in a well-developed league to improve on the status I have got in the world of football.
“And I am very sure I can achieve my aim with these clubs. But sure, my mind is set and made up to leave Ashdod in this summer’s transfer window in as much as the deal terms are met with and sealed with any of these clubs.”