Arsene Wenger has expressed his delight after securing the South Korean's signature, with the player vowing to never give up in order to show his best for the Gunners
The 26-year-old is the captain of South Korea and joins the Gunners with a record of 25 goals in 91 appearances over the course of three seasons in Ligue 1.
"We are delighted to have signed Chu," Arsenal manager Arsene Wenger told the club's official website.
"He will add true quality to our attacking forces and will be a valuable addition to the squad."
Park said: "I am very honoured and I feel very happy to be at Arsenal. It is a dream to be here and I am really pleased to be an Arsenal player. Now I just want to show how good I am and prove myself.
"In my opinion this is a great club, now I have to show what I can do on the pitch. I will do my best, I will never give up, I will show heart, I will give everything and I hope [the fans] will support me."
Park prefers to be known as 'Ju', and as such will have J. Y. Park as his shirt name, and will also take the vacant No. 9 shirt.
The deal is still subject to the completion of the registration processes, but this is expected to be a mere formality.