Looks like people are trying to "sell high" in Japan. On the day of the news, checked out Japanese auction sites and had a few dozen listings for Hibiki 17, mostly single bottles. A couple of those listings with multiple bottles for sale ended and price was about 50,000 yen per bottle. One auction was for two bottles (with boxes) ended at 102,000 yen and another auction for six bottles ended at 270,000 yen.
Checked again today and there are over 300 listings for Hibiki 17 and many listings for multiple bottles. One auction for 6 bottles started at 240,000 yen and another listing for 12 bottles is asking 500,000 yen, with a "buy it now" price of 1,000,000 yen. Unreal prices but good luck to sellers.