Yitzhak Kaduri was a renown rabbi who died in 2006.
As explained in the above Wikipedia page, there are claims that he left a note to be opened after his death. The note, when decoded as an acrostic, gives the name Yehoshua, and that is being interpreted as the name of the Mashiach (Jewish Messiah).
IsraelChai.com contains a purported copy of the note, and links the name to Yeshua (and then to Jesus in English).
Did Kaduri leave such a note?