SKY · LIGHT POLLUTION · JAPAN
Dark-Sky Sites Near Tokyo
The Kantō plain is one of the largest light domes on Earth — Bortle 8–9. To actually see the Milky Way and faint stars, you'll want to reach a darker site — and there are real dark-sky destinations within range of Tokyo, listed below.
SKY DARKNESS · TOKYO
Sky class (estimate)Bortle 9 · Inner-city sky
What you can seeThe entire sky is brightly lit. Only the Moon, planets and a handful of the brightest stars.
Bortle class is an authored estimate for the city centre, on the standard Bortle dark-sky scale — not a measured figure.
Darker skies within reach
~2 HR DRIVE WESTOkutama / Chichibu mountainsBortle 4–5 within a couple of hours west.
~2.5 HR DRIVE SOUTH-WESTMount Fuji–Hakone areaHigher, darker skies south-west.
Dark-sky designations from the International Dark-Sky Association and well-recognised dark regions. Distances are rough driving guides — always check access, opening hours and the weather before you go.
Plan tonight from Tokyo
More sky over Tokyo
SEE IT ON THE MAP
The live sky map shows the day/night line over Tokyo in real time.