The aged Shichida is the Shichida Junmai 75 (referring to a 75% rice polishing ratio), and is brewed with Yamadanishiki rice. The brewery matured the sake for two years before pasteurizing and bottling, and with the combination of the brewing technique, the result is a nice rich flavored and well balanced sake that will also do well if warmed. This bottle is definitely better than the regular Junmai (which is more polished) and is great with cooked food, izakaya fare and yakitori.
Yeah the summer sake was pictured on their IG page. Even though that one is a Junmai, it’s built very differently.
Here’s a brief mention of it back in May when it was showcased to industry people: