Nemurinokurinikku Kagurazaka

Nemurinokurinikku Kagurazaka is a sleep medicine clinic tucked inside an office building on Kagurazaka’s main stretch in Shinjuku. The name translates literally to “Sleep Clinic Kagurazaka,” and that’s exactly the focus — insomnia, sleep disorders, and the internal medicine issues wrapped around them.

The clinic’s website has some English content, which suggests they’ve thought about international patients at least a little. But “some English online” doesn’t automatically mean you’ll find fluent English speakers at reception. Realistically, expect basic communication at best, and bring a translation app or written notes about your symptoms if you want to get the most out of your visit.

The Kagurazaka area itself is one of the more foreigner-friendly pockets of Shinjuku — walkable, well-connected, and easier to navigate than some central Tokyo clinic districts. Third floor of the Kagurazaka Hoshodo Building. If you’re struggling with sleep and internal medicine is part of the picture, this is a genuinely specialized option rather than a GP who’ll just hand you Melatonin.