Yasuhito Endo and Hayato Sasaki scored second-half goals Tuesday as defending champion Gamba Osaka began defense of its Asian Champions League title with a 3-0 win over China's Shandong Luneng.
Endo, last year's player of the tournament, gave Gamba a 2-0 lead with a penalty in the 72nd minute after Shandong defender Alejandro was called for a handball in the area.
Sasaki put the game out of reach seven minutes later, picking up a loose ball off an Endo cross and firing home with a long-range right-foot blast.
Chinese Super League champion Shandong had few chances and was never a serious threat to the 2008 winners.
Brazilian Leandro, acquired from J-League side Vissel Kobe in January, put the hosts up 1-0 in the 20th minute when he drove in a low, angled shot from the top of the area.
Gamba defeated Adelaide United last November to become the second Japanese club in two years to claim Asia's premier club prize.
Gamba was without Akira Kaji in Tuesday's Group F clash. The former Japan defender injured knee ligaments during Saturday's 3-0 win at JEF United Chiba in the J-League.
Japanese clubs have won the last two ACL titles. The Urawa Reds won the competition in 2007.