Musashi withstood 19 torpedoes and seventeen bombs before finally going down
http://www.history.navy.mil/photos/s...-m/musashi.htm
Yamato took ten torpedoes and "several" bombs
http://www.history.navy.mil/photos/s...z/yamato-n.htm
The KGVs were hardly in that class, but eight torpedoes sounds about right for a modern battleship which did have dedicated anti-torpedo protection.