Places to drink hojicha in Tokyo are closer to hand than you might expect. What follows stays inside what each shop's own official information states. Opening days and hours change, so please check them on the official site before you go. Anything we could not confirm has been left out rather than guessed at.
A cup inside the station
Kaga Bōcha Maruhachi Seichajo's ecute Shinagawa branch sits inside JR East's Shinagawa Station. It is described as a tea stand you can drop into without ceremony, with four kinds of Japanese tea always available, Kaga bōcha among them, and the shop says you can drink in as well. The crowd moving past it is usually in a hurry, which is part of the point.
Ochazuke Onigiri Yamamotoyama in Shinjuku is Yamamotoyama's first shop devoted to ochazuke and onigiri. The ochazuke is based on a hojicha broth, and the onigiri are introduced as carrying the aroma of good nori. The nearest access is the B1 level of JR Shinjuku Station, inside the ticket gates. This is the version of hojicha you eat rather than drink.
Roasted in-house, down in Ningyocho
Morinoen's Ningyocho shop is a hojicha specialist that roasts its own tea. Its frequently asked questions state that the soft serve and the hojicha are takeaway only, and that there is a bench outside the shop where you can sit and eat. It is not a place to settle in for an hour; the shape of the visit is to take something away and drink it outside.
In Minami-Senju, Arakawa, 'Hojicha to Coffee Kobayashi Shoten' is a small specialist that, by the owner's own account, handles hand-roasted hojicha. The phrase 'the traditional handwork of Japanese tea' is attached to that description. Any comparison with machine roasting is the owner's own explanation, and we read it as exactly that. Coffee stands in the shop name too, alongside the tea.
In a Japanese garden, inside a park
The official information for Sumida Park introduces Hotoka HOJICHA FACTORY as a Japanese-style cafe you can enjoy within the park's Japanese garden. Individual menu items could not be confirmed from the official pages, so that part is best seen on the spot. It is a place you can fold into a walk rather than plan a day around.
Five shops, five different ways of serving
Read together, the five make one thing clear: 'a hojicha shop' in Tokyo does not mean one kind of place. A tea stand inside a station with seating, a takeaway counter with a bench outside, a food shop where hojicha is the broth, a hand-roasting specialist that also sells coffee, and a cafe inside a park garden. Which of those you actually want is what decides where to go.
Two of the five state their serving format plainly — the station stand says you can drink in, and the Ningyocho shop says takeaway only. For the others, the official text does not spell out how the tea is served or exactly what is on the menu, which is why we have not written it. Check on the day, and take the shop's own wording as the reference.