Message #504
The slow error is like the game is running frame by frame. Try the patch above and check if it helps.
And check your config to be sure you are running a jp game correctly:
https://www.h-suki.com/hswiki/doku.php?id=t_basics" target="_blank" title="https://www.h-suki.com/hswiki/doku.php?id=t_basics">https://www.h-suki.com/hswiki/doku.php?id=t_basics">https://www.h-suki.com/hswiki/doku.php?id=t_basics">https://www.h-suki.com/hswiki/doku.php?id=t_basics
And check your config to be sure you are running a jp game correctly: