After extensive research, and a lot of study, with only a shade of 100% thought, I have conducted and found the greatest proof that Kushina could use the Bijuu Dama while she was still alive!
Here it is.
Here it is.
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As you can see, after I typed in Kushina's name, the term "Bijuu Dama" came up, and who knows better than Cleverbot? as Cleverbot knows more than Kishimoto himself.