As the joke says:
Japan in 1980 was 2000
Japan in 2000 was 2000
Japan in 2020 is 2000
The way I heard it phrased is "Japan has been living in the year 2000 since 1980"
Been here since 1998. Can confirm. ;-)
The way I heard it phrased is "Japan has been living in the year 2000 since 1980"