They were very courteous and taught me how to open it.
However, on the way back from the store, the leaven blows and blows through the lid.
It took me 2 hours to open it. The first thing to do is to lower the lees and let the gas escape to the top, and it took a long time to get it right.
A lot of lees was fluffy with gas, really like a shake. Dessert Sake