Hi, sorry to write in English on an old thread. I'm afraid you will have to translate because I do not speak any Russian.
This black dog's pedigree was uploaded by me, based on a catalogue from the Hyogo branch NIPPO show 2017 in which his name was given as 皐丸 (Satsukimaru). His name appeared later in the catalogue of the Hiroshima branch show 2018 as 皇丸 (Sumeramaru? Koumaru?) to the best of my memory, and you apparently find another source where he is written as 皐九 (Satsukiku). Without any of us seeing the registration documents of this dog (I have certainly not seen them), please do not assume I have written it incorrectly based on internet information. Besides, the mother is "Satsuki" and the father is Toraichi"MARU", so Satsukimaru would be a logical name for the son. It is clear that the confusion probably arises from poor handwriting on show entry forms by the owner.
The photo of the mother Satsuki is sourced from Meinansou. Satsuki was sold to as a pet to a nearby family when she was a puppy, and under agreement had a litter of puppies by Toraichimaru (a dog which does not carry the cream/white gene) when she became adult.
Let us respect the research work of others and have courtesy to each other without making assumptions.