It is 2 a.m. on my first night in Japan

You're awake at 2 a.m. on the first night in an eastbound trip — that's the classic "body is still on the old clock" fork, not insomnia and not something to fight with willpower.

The fork, named back: you travelled east, so your body clock is *behind* and needs to advance (get earlier). Eastbound is the harder direction (~1 h/day of adaptation vs ~1.5 h west) [Source: CDC travel/jet-lag page, accessed 2026-09-02]. So the goal tonight is not "sleep 8 hours at 2 a.m." — it's "stop the body clock from sliding later, and be ready for the right night."

1. What you already tried vs. better alternatives

Tonight, in order (each step under a few minutes):

1. Keep the room dim right now. No bright screens, no bright hallway for the next hour. Evening/night light pushes your clock the wrong way for eastbound.
2. Try lying down. If you're not asleep within ~20 minutes, get up, sit in dim light, do something dull and quiet, come back when sleepy. Don't spend hours awake in bed.
3. No alcohol as a sleep aid — it shortens sleep latency and then fragments the night [jet-lag card, line 6].
4. Set one alarm for tomorrow morning and get up with it. That's the anchor the whole week hangs off.
5. Tomorrow morning: outdoor light again, early. Then caffeine early in the day, stopped by mid-afternoon local — nothing in the destination evening.
6. Eat what's already at home: small meals, ordinary family food, water. Don't cook a big late dinner.

Kids and the older relative: kids' sleep is disturbed "just as in adults" — keep the *same* wind-down chain as home, move bedtime about 1 h/day toward destination time, and don't invent a special child light plan [CDC family travel]. The elder keeps their own fixed wake time and their own daytime naps short; watch for daytime drowsiness or muddle-headedness rather than pushing their schedule.

2. Avoid list

• No long naps, no sleeping in past your alarm.
• No melatonin, no "sleep aid" powders, no buying anything prescription online — anything timed or prescribed is a clinician's call, and I don't dose anything, including for kids or the elder.
• No changing anyone's existing medication or supplement.
• No bright evening light, no screens in bed.
• No driving or safety-critical work when sleepy. That is a hard stop, not "short trips only."
• No white-knuckling it to a destination bedtime your body can't reach.

Weekly anchor for this trip: *One fixed wake time in Japan, set from the first commitment that can't move, held every day — including the day with nothing on — and kept even after a bad night. Bedtime follows sleepiness; the wake time doesn't negotiate.* [jet-lag card, line 9]

3. Decision tree

```
Is it 2 a.m. local and you're wide awake?
├─ Yes → dim light now, attempt sleep, no screens.
│ Asleep ~20 min? → stay in bed.
│ Not asleep? → up, dim light, quiet, return when sleepy.
└─ Tomorrow daytime: sleepy but must function?
├─ Need it → nap 15–20 min, before mid-afternoon local.
│ (a long afternoon nap is what cost you tonight)
└─ Don't need it → light + walk instead.

Red flag? → see below, stop the DIY plan.
```

Red flags — when to stop and get help

Stop the lifestyle plan and go to a clinician if:

• You're sleepy while driving or doing safety-critical work — that's the one that overrides everything above.
• Breathing pauses or gasping during sleep, blue/grey colour in sleep, chest pain with blood → urgent care.
• Still badly broken well past the ~1 h/day eastbound adaptation estimate, or that estimate runs past the whole stay → a few diary rows and a clinic visit beat another light trick.

Success in 24 hours — and what this week looks like

Not a cure promise. Success is: one decent block of sleep at destination night (even 4–6 hours without an alarm), waking at the fixed time without needing a rescue nap, and no long afternoon nap tomorrow. That's the whole win for day one.

Record or clinician: this is a week to record — each morning, one line (sleep, wake, naps, destination time). If it hasn't settled by roughly the end of the stay, take the rows to a clinician rather than trying another light trick.

Hand-off: tonight's moves and the wake time are yours to decide. Anything timed or prescribed — melatonin included — belongs to a clinician, and a jet-lag light calculator is a tool, not a prescriber. Sleep still broken long after the adaptation days, or sleepiness unsafe to drive, goes to `family-doctor`. [Hand off, jet-lag card]

One thing I'd need to sharpen this: roughly how many time zones did you cross, and from where? Eastbound from Europe and from North America call for different evening-light windows, and I'd rather give you the right one than a guess. Say the word and I'll also set the fixed-wake and diary reminders at your Japan local time (Asia/Tokyo) — I won't set anything until you confirm that's the zone you want.

Sources: CDC Jet Lag (wwwnc.cdc.gov/travel/page/jet-lag, accessed 2026-09-02); CDC Yellow Book jet-lag & family travel pages (research fetch 2026-09-02); wake-time rule from `references/hygiene.md` (MedlinePlus / NHLBI).