Which of the following is one of the six top varieties of sake rice?

Yamada Nishiki is often regarded as the premier sake rice variety and is one of the six top varieties used in sake production. This rice is known for its ideal characteristics that contribute to high-quality sake, including a large grain size and good starch content, which allows for effective fermentation and results in a refined flavor profile. Many brewers consider Yamada Nishiki essential to achieving premium-grade sake, particularly Ginjo and Daiginjo styles. It is primarily grown in the Hyogo Prefecture and is highly sought after for its ability to impart elegance and complexity to the resulting sake.

The other varieties listed do not have the same renown or are not considered within the top six for sake production. Each has its own unique properties and uses, but Yamada Nishiki stands out as the choice that aligns with the traditional benchmarks for top-quality sake rice.