T
okyo’s Nerima Triangle Building, a bright‑yellow domino, is among the world’s narrowest dwellings, yet it houses four separate units on five stories plus a basement, all within a parking‑lot footprint. Its narrowest side measures just under two feet. The building’s past as a micro‑bar spot is still visible on its signage.

    In 2023, YouTuber Norm Nakamura of Tokyo Lens offered a rare interior tour, likening life there to “living in your own personal Toblerone block.” The video, now over 13 million views, was reposted on X this week.

    The four full‑floor apartments are linked by a precarious staircase. Each unit opens to a kitchenette that fits a metal sink, a single hot plate, and a mini‑fridge. A locker‑sized shower behind the door contains a small tub and a window. The single room, barely 8 feet wide, holds a futon and overhead cabinets for storage.

    The building sits at a noisy five‑way intersection in Nerima. One unit rented for about ¥28,800 ($268) per month in 2023. While the rent is low, residents face two major drawbacks: constant traffic noise and shared bathroom facilities that resemble airplane lavatories, requiring residents to exit their apartments and cross the narrow stairwell to use them.

    Despite its cramped dimensions, the Triangle Building remains a striking example of ultra‑compact urban living in Tokyo.