Which type of sake typically contains added distilled alcohol?

Futsuu-shu is the type of sake that typically contains added distilled alcohol. This category of sake is often referred to as "ordinary sake" and is the most commonly produced and consumed style in Japan. The addition of distilled alcohol helps to stabilize the sake, enhances its flavor, and can also make the brewing process more efficient by allowing for a quicker fermentation.

Junmai, on the other hand, is a pure form of sake that does not have any added distilled alcohol, focusing solely on the essence of the rice and water used in its production. Daiginjo is a premium sake that also does not have added distilled alcohol, showcasing the delicate flavors of high-quality, polished rice. Namazake refers to unpasteurized sake, which again typically does not include added alcohol, retaining its original fresh flavor.

Thus, Futsuu-shu stands out as the option that specifically allows the inclusion of distilled alcohol during its production process.