A Parramatta Eels junior, Inu made his first grade debut in the 2007 NRL season against the Canberra Raiders. After just one first grade match he was named to play for New Zealand in the ANZAC Day Test against Australia at Suncorp Stadium in Brisbane. The Kangaroos ran out easy 30-6 winners over the Kiwis. After the test, Inu was dropped back to Premier League but returned to first grade through a series of injuries to regular players. Inu took on the kicking duties as Parramatta's primary kicker and full-back, Luke Burt, was injured mid-season. In round 25 Inu scored three tries and kicked seven goals in Parramatta's 46-point win over Brisbane. Inu played in Parramatta's 2007 preliminary final defeat by Melbourne at Docklands Stadium. In August 2008, Inu was named in the New Zealand training squad for the 2008 Rugby League World Cup, and in October 2008, he was named in the final 24-man Kiwi squad. After a 2-4 start to the 2009 season, Parramatta decided to re-tool their line-up, dropping Inu to the New South Wales Cup, with Taulima Tautai replacing him for the round 7 match against the Brisbane Broncos. Inu played in the 2009 NRL Grand Final for Parramatta against the Melbourne Storm at centre. At the end of the 2010 season, Inu told coach Daniel Anderson that he would be joining The New Zealand Warriors on a two year deal.
Inu was released by the Warriors in May 2012 so he could immediately join the Des Hasler coached Bulldogs. He signed with the Bulldogs until the end of the 2015 season. Inu played in the 2012 grand final for Canterbury.
Catalans Dragons
Inu returned to rugby league and was signed by Catalans Dragons in June 2015 to add depth to a depleted squad. On 17 November 2017, Inu signed a two year deal to join The Widnes Vikings.
Widnes Vikings
On 4 April 2018 Inu broke his leg in a match against The Warrington Wolves. Before the injury, Inu had scored 6 tries in 9 games.
Salford Red Devils
On the 27th of March 2019, it was announced on the Salford Red Devils official website that Inu, has signed a contract with immediate effect. He joins the Super League club on a deal that will see him return to the Super League after previous stints with Catalans Dragons, and Widnes Vikings. He played in the 2019 Super League Grand Final defeat by St. Helens at Old Trafford.
Goal kicking style
Inu is known for smiling and laughing before attempting a conversion at goal. This was first revealed during the 2007 NRL season. It later became his trademark and some media Sydney media outlets dubbed him "The Smiling assassin". Inu explained his reason behind this saying "It started at training, Every time I practised kicking, the first thing I'd try to do is kick from the sideline and everyone would start bagging me out and I would start laughing. It's the same when the crowd starts booing. I just start smiling and laughing. If they are going to boo me I might as well laugh about it and if I get it over it just shows them up so I can laugh even more".
