Traveler's Factory is a small shop in the basement of Tokyo Station, near the Marunouchi north entrance and exit. It sells travel notebooks and Tokyo Station limited stationery, including leather cover sets, refills, stickers, and postcards, and you can stamp the notebook you buy. To find it, face the station from the plaza in front of the ground-level Tokyo Station, take the elevator at the far left down one floor, and go behind the fancy goods shop. The shop is very small, so the aisles are narrow.