I used to see the Rockabilly dancers all around Yayogi Park in Shibuya (1). These guys would hang out in the park on the weekend with pompadours and jean/leather jackets and do goofy dances. It was sick. Something about Japanese culture encourages dedication to your hobbies, and people get super involved in them.

1) https://www.tokyoweekender.com/art_and_culture/tokyo-rockabi...

Watched them in January this year, cold and windy and they were still going hard. It was a lot of fun!

They're still very much there in 2025.