"No lockdown" is misleading. The government asked people to stay at home and the vast majority of people did. Many non-essential businesses closed. I walked through the usually bustling downtown area of my city on a Friday night and it was absolutely dead. It was like an apocalypse film.

That said, life has broadly gone back to normal, and if you look at the graphs [1] you can see that coronavirus has gone back to work just like many service industry workers.

[1] https://covid19japan.com/