كتب : Omar AbdelAziz
The 23-year-old, who has just seen his contract with Saudi Arabia's Nasr expire, is in advanced talks with the Egyptian champions.
Ahli are currently looking for a replacement to top scorer Flavio Amado, who signed for Shabab recently.
Omotoyossi has been a regular for Benin since making his international debut in 2004, scoring eight goals in 16 games.
The muscular forward netted the Squirrels only goal in last year's African Cup of Nations, courtesy of a header against Ivory Coast in a 4-1 defeat.
The former Helsingborg man also scored the only goal for his nation in a 5-1 friendly defeat to Egypt late in 2008.