I'm from a tropical country and I haven't experienced any temperature lower than 20C (as written here http://www.japan-guide.com/e/e2273.html). I've been reading and some people mention that temperatures drastically fluctuate sometimes.
I'm going to Fukuoka for the entire of April and I'm not sure how thick should my outerwear be. I'm currently shopping for outerwear but several international stores with Spring wear have light jackets (blazers, cardigans, biker and denim jackets). Are these good enough or should I get something thicker?
Also, I think it's still cold in April but in popular international shops like Topshop or Zara, their clothes are so thin and very spring-like, and in tourist photos, I see people wearing thick clothes during April, so I'm really confused.