Riding my Electric Skateboard in Japan

Warning: At the bottom of the article there is a bloody photo of my accident when I fell down from the skateboard going top speed
I bought my first electric skateboard [boosted board] from Hawaii a little over 1 year ago before the coronavirus epidemic and when it was safe to travel. However, I knew that there was a risk that I might not be able to bring it back to Japan. There was a chance that the airport in Hawaii…