Climate and weather considerations
Despite the common misconception among many Westerners, Japan is not a tropical country. While some regions in southern Japan, such as Okinawa, have a subtropical climate with higher temperatures and humidity levels compared to other parts of the country, the majority of Japan experiences cool, temperate weather patterns familiar to Western people, perhaps best compared to southern parts of Europe.
The northern regions and the central mountains of Honshu (the main island of Japan) see significant snowfall during winter months. This misconception likely stems from the popularity of tropical destinations within Asia such as Thailand or Bali.
The weather across Japan is complex, has a wide temperature range, and changes rapidly. Understanding Japan's true climate is essential for travelers to properly plan their trips and pack appropriate clothing for the varied weather conditions they may encounter.
Modesty
Western sources love to share outdated information, blatant stereotypes and puzzling myths about Japan and modesty. You can ignore nearly all of those people online. They're full of you-know-what. Many came to live here for a couple years, then went off to seek their fortune as "Japan experts," which they aren't. (I've been here over 19 years and am not an expert on the Japanese. I never will be.)
Older people in Japan value modesty and conservative dress, so you may wish to avoid clothing that is too revealing or too flashy. But the younger generations don't really care any more. They themselves tend to dress casually but fashionably. (Jeans are widely considered fashionable clothing, too.) Shorts and t-shirts are acceptable nearly anywhere that isn't a formal or business event. A very few shrines and temples in Japan ask visitors to dress modestly or possible remove hats. (There will be signs in English.) Nowhere in Japan requires women to "cover up" or veil themselves.
Footwear
Many traditional Japanese buildings require visitors to remove their shoes before entering, so slip-on shoes or sandals that are easy to take on and off are a good choice, as are clean socks without holes!
If you're visiting many shrines and temples and have large feet, consider carrying a pair of indoor-only slippers in your bag. Many require you to remove outdoor shoes, and while some offer slippers, those won't fit many Westerners.
Visiting Japan is an incredible opportunity to immerse oneself in a culture that seamlessly blends tradition and modernity. From the bustling streets of Tokyo to the serene temples of Kyoto, there is always something new and exciting to discover. Wearing proper, comfortable clothing will help you to take advantage of this unforgettable experience, embrace the unique customs and traditions, and create lasting memories that will stay with you long after your trip has ended. Have a great time in Japan and make the most of every moment!