Your brewing guide suggests 2-3 oz of water and 1.5 teaspoons of tea for premium Sencha Zuiko. Isn that too little water?
“2-3 oz” is very little water, but it means that this tea can be enjoyed as a very strong cup of tea. Since Sencha Zuiko or any high quality Sencha and Gyokuro contain a lot of theanine (amino acid), the cup will be very sweet with little bitterness if you brew it at a lower water temperature, about 160 degrees. Regular Senchas will not have such a sweet taste when brewed this way. The suggested brewing parameters will allow you to experience the exceptional flavor that you can get only from this tea. Of course, this is a suggestion and you can adjust the amount of water to suit your taste.