When it rains we tend to go to ground at home. Hide and keep dry.
Not so in Korea and Japan.
There are umbrellas for your use at all the hotels and in tourist parks. There are plastic bags for you to place your wet umbrella in as you enter department stores and museums. There are racks to leave your umbrella in when you go into the supermarket. And there are even umbrella drying sponges available.
It has been a slow learning process, but we are getting the message, carry your umbrella to keep dry. In the intense humidity and soaking rain an umbrella does a better job than a raincoat.
So our souvenir from Japan are two very light carbon fiber folding umbrellas.