https://www.kotaku.com.au/2017/12/new-dragon-ball-cafe-opens-in-japan/
"Last Friday, the official Dragon Ball Cafe and Diner opened in Osaka, Japan. The eatery serves up Dragon Ball themed food and drink, showcases beautiful art, and sells special merch."
"For a limited time, Chinese restaurant Tokokuro has been converted into the Dragon Ball Cafe and Diner. This isn't the first Dragon Ball restaurant to hit Japan (there have been others!), but it does appear to be the nicest. The food this time around also looks better."
If you are planning on visiting Japan in the near future. Give some of these places a try.