Kimi no koto wa itsumademo watashi no kokoro ni kinen sarete iru.
Remarks about the translation
<edit>Before edit : "kimi no koto istumademo watashino no kokoro kinen"</edit> (01/07/francky thanks to IanMegill2 who provided the correct version in Romaji.
Well, here the important word here is "itsumademo" (forever), which is misspelled, both in the text and in the title!
kimi no koto itsumademo watashino no kokoro kinen
but we will have to correct it to
kimi no koto wa itsumademo watashi no kokoro ni kinen sarete iru
for it to make sense.
The corrected version would mean:
my heart forever holds the memory of you