The lesson is still relevant though - i.e. if you bought shares in the top 100 Japanese companies in 1989, it would have taken you ~35 years to break even in nominal terms. That's clearly a bad investment.
Well it also paid dividends the entire time too which doesn’t get factored into the price. So maybe it matched up with inflation. I don’t know either way. You’d have to compare the total return with the total inflation.