We've seen low polished sake, it's perhaps a little more common these days.. however, many low polished sakes on the market are only possible with the use of special sake rice varieties that are chosen because the rice can handle being polished to those extremes.
Okayama is notoriously proud of being the home of the best Omachi rice in Japan; and Omachi is notoriously difficult to work with. Sakes made with Omachi rice normally result in a beautifully complex sweet/dry/herbal flavour profile and very seldom are polished below 40%. Omachi rice tends to break past those levels, and also becomes difficult to control while steaming and soaking.
Miyashita has taken up the challenge, and triumphed with the insane achievement of the lowest polished Omachi Junmai Daiginjo sake in Japan. Definitely a statement from the brewery.
Extremely limited quantities.
Presented in a wooden presentation box; and a very cool metal hang tag.