"Anytime you get to start opening day, no matter what continent it's on, it's pretty cool," Kershaw said.
Manager Don Mattingly made the announcement Sunday after weeks of speculation about who would start in Australia.
Ryu got the start in Game 2 because of an injury to Zack Greinke, who strained his right calf while throwing four pitches in his only spring appearance on Feb. 27 against Arizona.
Before getting hurt, Greinke said there was "zero interest" in making the long trip. He is not expected to travel.
Greinke was scheduled to throw a bullpen session Monday.
Kershaw pitched five innings on Sunday in his penultimate tuneup for the season opener, giving up five hits to a split squad of San Francisco Giants during their 3-2 victory over the Dodgers.
Kershaw allowed a two-run homer to Brandon Hicks in the second.
Cardinals sign Cuban shortstop Diaz
The St. Louis Cardinals signed Cuban free agent shortstop Aledmys Diaz to a major league contract and he'll report to spring training on Monday.
The Cardinals were among a number of teams, including the Yankees, who held private workouts for the right-handed hitting Diaz and the deal is believed to be for $15 million to $20 million for four years.
The team planned a news conference for Monday.
"We have been following Aledmys for quite some time," general manager John Mozeliak said in a statement. "His signing marks a significant benchmark for the Cardinals in the international arena and we are excited to have reached this agreement."
The 23-year-old Diaz batted .315 with 12 home runs and 11 steals in 270 at-bats in 2012 for Los Naranjas de Villa Clara, Cuba's highest professional league, which has produced Oakland's Yoenis Cespedes, the Dodgers' Yasiel Puig and Cincinnati's Aroldis Chapman.
The Cardinals anticipate the 6-foot-1, 195-pound Diaz will start the year at the high minor league level.
Rockies 10, Royals 1
Juan Nicasio pitched four scoreless innings, Kyle Parker drove in five runs and the Colorado Rockies beat the Kansas City Royals 10-1 in Surprise, Ariz.