Time Out says
Opened in March 2014 inside Tokyo Station, this café and store is great for a pitstop, giving you the chance to do a bit of shopping and then relax with a cup of coffee. Targeting tourists and business travellers, Standby Tokyo focuses on travel goods and souvenirs. If you're looking for a gift, choose from Klean Kanteen tumblers, a range of Traveney and Travelife products, and Japanese sweets from Tokyo Campanella. The café serves delicious coffee from Sarutahiko and hosts photographic exhibitions curated by Popeye Camera. There's free Wi-Fi and iPad minis are available for use.
Inside Tokyo Station, near the Shinkansen south transit ticket gates, 1-9-1 Marunouchi, Chiyoda-ku, Tokyo