Japan - my scenario of consumer price fall was too optimistic

I've found a new projection of labor force in Japan between 2010 and 2050. It says that the rate of labor force participation will be decreasing together with the depopulation of Japan. This means that the level of labor force will be falling much faster than it was used in my recent prediction. Considering the multiplication factor of 1.4, the rate of CPI inflation will reach -1% per year on average in 2020. By 2050, it will reach almost 2% per year (1.89%). The overall drop in consumer prices will be more than 2/3 by 2050.  This fall will be accompanied by the decrease in real GDP at a rate of 1% per year and the debt rise to 500% of GDP.