Yamato transport - set delivery date

Hi we arrive in Osaka with all our luggage and snowboards, however we don't need the snowboards until 6 days in at hakuba. I don't trust the ski resort to hold our snowboards for us and was wondering if we ship them through Yamato transport whether they will hold them for 6 days and have them arrive at the hakuba accommodation the date we arrive. Thanks for your help.

Yes, it is possible to specify a delivery date that is a few days in the future (there is a maximum number they can hold it, but I think the maximum is larger than 6):
http://www.kuronekoyamato.co.jp/en/personal/ski/