Your help on katana

Hello, I ask for your help, I have 3 questions to ask you;
the first is to read the signature on the nakago I can't understand if Motozane or Motosada.
the second is an original signature (I see many beatings on the metal).
the third is on the nakago there are five signs on the edge mean something in particular.
Thanks for your help
I attach the photos

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To me it is Motozane (Motosane)

Best wishes