Koro Go is The Mother of all Shiba Inu

She mated with Ishi Go the father of all shiba to produce her offspring Aka Go and Ishi Go (Jr)

As you can see here
https://www.shibapedigree.com/details.php?id=63636

she has no Sire or Dam as Aka Go does here
https://www.shibapedigree.com/details.php?id=63640

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