Vivitix stores are the more chic and trendy version of your regular Sanrio Gift Gate and there are only 10 across the entire Japan, and the most popular one amongst it gotta be the Tokyo store in bold fuchsia pink:

Located in Sunshine City, 3-1 Higashi-Ikebukuro, Toshima-ku, Tokyo, it’s a place fashion fanatic can’t miss!

Other Vivitix stores can be found at: Tokyo Sanrio Puorland, Odaiba, Yokosuka, Nagoya Bay, Kobe, Kyoto, Matsudo, Toyama and Kawasaki.  Check this page out for the exact address and hours of operation.