A homegrown action film about a 16th-century Korean naval hero's astonishing victory against Japan surpassed the 5 million viewer mark on Monday, the movie's investor-distributor said.

"Roaring Currents" exceeded the milestone at about 9:30 a.m. Monday, the sixth day since opening, CJ Entertainment said.

This was four days faster than a record shared by "Snowpiercer" (2013), "The Face Reader" (2013), "Iron Man 3" (2013) and "The Thieves" (2012).

Released on Wednesday, "Roaring Currents" has set various records in local box-office history, becoming the most-attended movie on an opening day, on a business day and on a single day. It also passed the 2 million, 3 million and 4 million marks in the fastest time in history. 

The historical drama starring Choi Min-shik tells the story of Admiral Yi Sun-shin's astonishing victory against Japan in the Myeongnyang Strait, near the southwestern island of Jindo, where he conquered over 300 Japanese ships with only 12 ships in 1597.  (Yonhap)