The Belgian says he's fit and ready following a 2018/19 campaign interrupted by injuries.
"I'm fine," De Bruyne said after the 3-1 win against Yokohama F. Marinos, in which he netted the opener.
"What happened last year happens to everybody. I have been a professional for 11 years now and had one season where I had some injuries.
"But by the end of the year I still played 32 games while a lot of players only do that every year.
"I just get on with it. Now I feel good. I'm happy I could play a whole pre-season. I'm doing well."