Pack or skip
Packable down jacket for Osaka in December
Verdict
Pack it
Lows around 39°F — the packable puffer covers 90% of layering needs.
Why
Osaka in December averages highs of 52°F, lows of 39°F, 6 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 39°F — the packable puffer covers 90% of layering needs.