"It has been a long six weeks but I feel like I am ready now," said Kaino. "I would have loved to have been available to play [on Wednesday] but it was too much of a risk. I don't think that was ever in consideration. Match fitness ... I have got to get on the field to see how that goes.
"My focus has been on getting my body right to give myself the best opportunity to be available for the first test. I kind of knew the Samoa test, if selected, would be my first game back. My sole focus has been to get my knee as strong as possible."
A test against the physically destructive Samoans will provide the ultimate examination of Kaino's knee.
Kaino, who was born in Samoa, has built his own game on a similarly destructive portfolio. And while he's capable of adapting his game to any opponent, he says a Pacific derby is something he will relish.
"I guess if you want to test yourself physically, then those Pacific Island games - especially Samoa - are the ones you want to measure yourself in. I am looking forward to it. I can't wait to get back on the field.
"I love those kind of games. You can try to replicate it at training but it is never the same. The only way you can get that match fitness is by playing, and taking on Samoa is a great way to not just measure yourself but get ready for the Lions.
"[Being injured] has given me time to mentally refresh and take a step back from the game. I am as hungry as ever. The timing hasn't been good, as I missed some Blues games, but it has given me time to refresh."
In looking at the unimpressive start to the tour by the Lions, he's convinced the tourists, like him, will improve with play.
"It is hard because of the combinations and the travel," he says. "I think they are just coming to grips with that. They will get better. I compare it with how we prepared for the 2015 World Cup. We weren't playing that well in the pool rounds but the further into the competition we got, the better our combinations got and our game together. I know that come the tests, they will field a great side and they have some great players."