This can be over wintered for £40. Over wintered means until your pond is warm enough to collect the koi, not date related. This will come with a breeders certificate, from the breeder or Narita No 1s event. I had to take a second glance at this, as it has a showa kind of feeling to the sumi, but defo sanke. All the sumi is tsubo, and has nice big blocks, when it comes out it will look very nice !