Pack or skip
Packable down jacket for Tokyo in January
Verdict
Pack it
Lows around 34°F — the packable puffer covers 90% of layering needs.
Why
Tokyo in January averages highs of 50°F, lows of 34°F, 5 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 34°F — the packable puffer covers 90% of layering needs.