The official Japanese Pokémon website has announced that the Pikachu and the Pokémon Musicians Cafe by Sweets Paradise (ピカチュウとポケモンおんがくたいカフェ by Sweets Paradise)
will be open in the Pokémon Mega Tokyo Pokémon Center
from July 18th, 2015 until August 31st, 2015. The cafe will be open for a limited time and will feature exclusive items.
Pikachu and the Pokémon Musicians Cafe Limited Edition Mug - 780yen / Apron - 2480yen
Pikachu and the Pokémon Musicians Cafe Limited Edition Keychains - 371yen each
Menu details will be announced at a future date but the pictures above are a sample of what will be available to purchase.