Low growth started in the 1990s, so it has lasted for three decades. Those who know nothing but low growth are already in their forties. And those who have happy memories of entering the job market during the bubble period and remember suffering through the collapse of asset prices are already in their fifties.
Many people say that they do not really mind if economic growth is low -- there are more important things than the economy. But if you tell them that low growth will lead to lower pensions, everyone will reply: "Well, that's a problem." The Scandinavian countries, with their comprehensive welfare systems, are all economically wealthier than Japan.