[Updated December 31, 2018] One of the e-mails I get most often from my Filipino readers contain questions about how to prepare for winter travel. It’s a valid concern for those of us hailing from tropical countries, and I honestly wish I had someone give me tips before I went on my first winter adventure. That’s why I decided to write this guide after having experienced varying degrees of the winter season; ranging from above zero Decembers in Japan, to snowy Sapporo, to a “moderate” -2 winter in Seoul, down to a more freezing -16 winter in Seoul. I feel a bit more comfortable writing this guide now that I’ve…