'Natsuko's Sake') is a Japanese manga series by Akira Oze.

[1] The story centers around Natsuko Saeki, a young woman trying to break into sake making, a business that's traditionally carried out by men.

Natsuko Saeki, a young woman working for an advertising company in Tokyo, returns to her family's home in the countryside.

There she finds her brother, Yasuo, searching for a "phantom" rice seed called tatsunishiki, rumored to create a new form of sake.

He finds a few seeds, but after he passes away suddenly, Natsuko quits her job and begins working at the sake brewery to realize Yasuo's dream of making the best sake in Japan.