Edinburgh have signed Fiji Sevens duo Eroni Sau and Kalione Nasoko, along with hooker Mike Willemse and back-row Nick Haining.
The quartet will arrive two-year contracts to the start of next season in the Pro14.
Nasoko is the current Fiji Sevens captain, even while Sau has one full global cap.
Willemse is joining from league competitions Southern Kings in his native South Africa and Haining is by using Bristol.
“Mike has a lot of knowledge in Super Rugby,” head coach Richard Cockerill said. “He is an incredibly competent hooker that plays in the type of Stuart Mclnally.
“He is all-action, very good within the ball and also exceptionally dynamic. He will push everybody to another level”
Willemse, 26, who played for South Africa in Under-20 stage, combined Southern Kings at 20 17 and it has made 36 appearances for the Port Elizabeth outfit, scoring five attempts.
Back-row Haining, 28, moved to Bristol in summer 20 17 from Jersey Reds and it has one take to from his seven Premiership matches this season.
“Nick is somebody I’ve been looking at for a while,” Cockerill added. “He is Australian, however, Scottish characterized. He is a very good player and keen to attempt and push himself into the team “
Sau, nicknamed”Sledgehammer”, enjoyed an impressive Test debut for Fiji in November, scoring a hat-trick at a 68-7 victory over Uruguay.
The 29-year-old is now with French Top 14 club Perpignan and Cockerill said:””Anyone who has observed sevens will know Eroni Sau. He is a very powerful and highly effective runner, he’s tough and very combative.
“A Nick Name like’The Sledgehammer” gives you a idea of everything he does with and without the ball,”
Cockerill clarified Kalione as”a tremendously exciting player”with all the 28-year-old that a winger having experience at outside center.
“Kalione brings different things to our own back-three,” he further added. “He gives us a little bit more of an x-factor and, like you see the fantastic teams across Europe, you want that type of threat.”