well,according to Toshiro Hitsugaya and Souseke Aizen's fight in episode 60,it is clearly that Aizen didn't kill Toshiro,he just landed a surprising blow to Toshiro's shoulder and almost nearly killing him.
Captain Toshiro Hitsugaya is not dead. Toshiro is quite obviously dead. he's in the SOUL society isn't he? But its okay, Becouse he doesn't Die like you prabably are Thinking. But I think he died by freazing on a frozen plain.
Toshiro tenic tonic tenten tanic tomic totoic hitsuguya And really all my mom did was swicth the second letter but nice that my full name and yes my name is toshiro hitsuguya not hitsugaya get it right