ANN exit poll on PR by age group
LDP - red
KP - pink
HP - dark green
JRP - light green
CDP - blue
JCP - purple
LDP-KP stronger with the youth and gets weaker with age but reverses in the 70s. CDP-JCP gets stronger with age again with reversal at 70s. HP-JRP seems to be the same for all age groups.
Interesting as isn't the LDP the more conservative of the main parties? In the English speaking world at least you have the opposite where parties on the left tend to do well amongst the youngest while as one ages they become more right wing. UK being the most extreme example where Labour won by 40 points amongst millennials but Tories won by 40 amongst seniors. Most aren't quite as extreme as that but still seems to buck the trend somewhat in the West.