Expo Sumitomo Pavilion Umbrella

I've always wanted this umbrella because I heard it significantly changes the temperature between the inside and outside. I finally got my hands on it after visiting the Sumitomo Building shop many times.
I wanted it so badly that I even asked my family to get it for me, and unexpectedly, they got me the same one.
I'm selling one of them.
Retail price: ¥12,100