There are at least two artists using this name. 1)
Kyoto, Japan (1997 - Present) Mortalized is a Deathgrind band from Kyoto, Japan. Line-up.
Takafumi Itsubara - Guitar
Ikeda - Drums
Takahashi - Vocals 2)
Mortalized is a Deathgrind band from Kazan, Russia.

Read more about Mortalized on Last.fm.