Thanks to Robin64 for the legwork.
European price has been confirmed at €4.99. Not sure about the UK price yet.
£4.49 on the UK eShop.
This is the game that lit up the Japanese eShop charts and Chinese social media. There are plenty of (almost uniformly positive) import impressions already, and Destructoid even has a review out and gave it 8/10:
The trailer on the European eShop has a video, and that video mentions the US price of $4.99. So there we go. :)
The Switch game worth an 'import' right now
It isn't every day that we here at Destructoid review imports, but like Dead or Alive Xtreme 3 which I also reviewed, Kamiko also features an all lady cast and offers an English translation if you grab it from the Japanese eShop. For a mere 500 Yen, which Google tells me is currently $4.60 USD, it was worth making a Japanese account and taking a chance on.