Ok, two things going on here.
1. A Japanese game company has built a faux Kowloon City in an warehouse/office tower in Kawasaki, Japan.
“Anata no Warehouse, a few minutes walk from Kawasaki Station, is the creation of a Japanese games company that decided the Walled City would make the perfect backdrop to a video-game arcade. Tokyo-based photographer Said Karlsson shot images from outside and inside the game center, which spans four floors, and has all the latest titles, a dedicated retro game corner and a floor with darts and billiards.”
2. This video above is something by Wall Street Journal, a look back at what Kowloon was.