Please, as translated into Japanese. Commonly used with "aishite" which means means, loosely translated "love me." So "aishite kudasai" means "Please love me." Also found in the Dir en grey lyrics of the song "Merciless Cult."
"ai shite kudasai kono chi mo sono imi mo
ai shite kudasai kono hi ni kono kachi wo"
"Please love me, this blood and the meaning
Please love me, this day and this value."
-Dir en grey, "Merciless cult"
Lyrics and translation from songmeanings.net