Japan will vote the DP in for a few years, things will get even worse, then they’ll go back to the LDP for a decade again.
The Japanese need a conservative party, not a bunch of RINOs like the LDP.
There will never be an Aristotelian/Burkean conservative party in Japan; the society is Confucian to the core. The best we can hope for is what the Abe faction of the LDP gives, which is Japan First without being militarist, and willing to continue the alliance with the US, along with the other rim countries, to protect themselves against Chinese hegemony.