That coffee with それ
Vocabulary Explanation: That with それ

Sampling the second coffee, Cocoa mistakenly identifies the coffee as Kilimanjaro. Chino corrects her.
- ココア:
- 「この酸味…キリマンジャロだね」
- “This acidity… it's definitely Kilimanjaro.”
- チノ:
- 「それがブルーマウンテンです」
- “That is Blue Mountain.”
Key Points
それ points to the coffee near Cocoa
Chino uses それ because the coffee is on Cocoa’s side of the conversation, close to the listener rather than to Chino.
The English “that” matches Chino’s viewpoint. She is pointing out the coffee Cocoa is sampling, not something beside herself.
この modifies 酸味
( , not the whole coffeeこの酸味
( means “this acidity”; この attaches directly to the noun 酸味( .Cocoa is reacting to one quality of the coffee, while Chino’s それ refers back to the coffee itself.
それが marks the corrected identification
In それがブルーマウンテンです, が singles out that coffee as the item being identified.
だね versus です in the correction
Cocoa’s キリマンジャロだね sounds casual and confident, like she is confirming her guess.
Chino’s ブルーマウンテンです is a simple, polite correction.