Subparameter j
By specifying subparameter j, you can adjust the baseline only for LBP. You can also use option -J: for the baseline adjustment, but it affects all the other Japanese fonts (not only for LBP font).
If LBP prints kanji fonts of LBP num% of the font height lower than the baseline without any subparameter j, specifying jnum*10 in the subparameter will result in the fonts aligned with the base line.
The default value in LIPS III/IV is 79.