Kanye also went on shoes and clothes shopping with Kourtney's eldest son, Mason.
On the other hand, Kim met with journalism students at Monash University's Tokyo Journalism Field School.
Other than this, everyone together went on to enjoy at a children's playground and a teamLab Planets digital art museum where the kids witnessed their hand-drawn pictures turned into animations.
"Kourtney was taking pictures everywhere and really enjoying the scenery," the eyewitness said. "They all seem to love Tokyo and can't get enough of the culture. The kids had a great time and they all loved their holiday there."
Kim also shared a clip featuring her four-year-old son, Saint West, having fun at a park playing with a spider filter.