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Sunrise and sunset in Osaka

Quick answer

What time does the sun rise in Osaka?

It ranges from about 04:45 at the height of summer (June) to about 07:06 at the darkest point of the year (January). Month-by-month times are below.

Sunrise and sunset through the year

Times for the 15th of each month in Osaka local time, 2026.

MonthSunriseSunsetDaylight
January07:0617:1010h 04m
February06:4517:4110h 56m
March06:1018:0611h 55m
April05:2818:3013h 02m
May04:5618:5413h 57m
June04:4519:1314h 28m
July04:5619:1314h 16m
August05:1918:4813h 29m
September05:4118:0712h 26m
October06:0417:2511h 22m
November06:3216:5510h 23m
December06:5816:499h 51m

The months that wreck your mornings

In Osaka the latest sunrise of the year is around 07:06 in January. If your alarm goes off before that, you are getting up in what your body still considers night. That is not a motivation problem. Your circadian rhythm is driven by light hitting receptors in your eyes, which trigger the cortisol rise that makes you feel awake. No light, no signal — so the usual advice about willpower misses the mechanism entirely.

The full guide to waking up before sunrise covers how to fake the missing dawn, and why light beats discipline for shifting a body clock.

What actually works when the sun is not up yet

  • Put light where you land. A bright lamp on a timer, or a sunrise lamp, gives your body the signal your window is not providing.
  • Get outside within an hour. Even an overcast winter morning delivers far more light than any indoor room.
  • Anchor the wake-up time. Consistency matters more in winter, not less — a drifting schedule plus a dark morning is the worst combination.
  • Remove the easy off switch. Dark mornings produce the deepest sleep inertia of the year, and that is exactly when alarms get dismissed on autopilot.

Other cities

Elsewhere in Japan:

Working out a bedtime for a dark winter wake-up? The sleep calculator will do the maths.

Frequently asked questions

What time does the sun rise in Osaka?

It swings a long way across the year. The earliest sunrise is around 04:45 in June, and the latest is around 07:06 in January. The month-by-month table on this page gives the times for the 15th of each month.

When is it darkest in the morning in Osaka?

Around January, when the sun does not come up until roughly 07:06. If you get up before that, you are waking in biological night — your body clock has had no light signal yet, which is exactly why winter mornings feel so much harder.

Why is waking up before sunrise so much harder?

Because your circadian rhythm runs on light, not on clocks. Morning light shuts down melatonin and triggers the cortisol rise that makes you feel alert. Before sunrise none of that has happened, so your body is still in night mode when the alarm goes off.

Does a sunrise lamp actually help?

It helps some people, by simulating a dawn your window is not providing. It is not a replacement for an alarm you cannot ignore, though — a gradual light on its own is easy to sleep straight through in the depths of winter.

Why people use Captain Wake to wake up on time

Not because it rings louder. Because it removes every way your half-asleep brain talks you back into bed.

There is no button to tap

Swiping an alarm away is a reflex you can perform while still asleep. A mission needs your thinking brain switched on — and once it is on, sinking back under is much harder.

It survives every trick

Force-quit the app, restart the phone, flip it to silent, turn the volume down. The alarm re-arms and keeps going until the mission is actually done.

It gets you physically upright

Photo and barcode missions are anchored to a spot in another room, so the only way to stop the noise is to stand up and walk there. You cannot pre-stage it from bed.

It fixes the night, not just the morning

A sleep forecast before bed, bedtime reminders and wake-up streaks — because the 6 AM problem usually starts at 1 AM.

Captain Wake

Dark outside is not a reason your alarm accepts.

Captain Wake keeps ringing until you complete a real-world mission — even at 07:06 in the pitch black.

Download on theApp Store
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