Tenshi

You'll find yourself on Upper Street in Islington, where Tenshi sits amongst the usual run of chain restaurants and gastropubs, except this place actually knows what it's doing. Walk in and you're immediately hit with the smell of tonkotsu broth that's been simmering since before you woke up—the kind of place where they're not messing about with shortcuts. The room itself is stripped back and honest: counter seating that puts you close to the action, proper wooden tables, and that specific kind of busy-but-not-pretentious energy that makes you want to linger over a bowl longer than you planned. Service moves at a decent clip without feeling rushed.