Step 1. In preparing any type of tea, first boil the water.
Step 2. The quantity of water should correspond exactly with the number of cups to serve at a time (see the reason in Step 4). Thus, after you boil the water, pour it into the cups and cool it to the required temperature for your type of tea (for instance 50 degrees for the Gyokuro tea and 80 degrees for sencha).
Step 3. Then put the tea product and the water from the cups into the teapot. Wait for about one minute before serving. If you serve several cups, do not fill one cup before passing to another. Pour small quantities in each cup first, then come back to the first cup and continue the cycle until the water finishes in the pot. No water should be left inside the teapot, hence the necessity to measure the quantity of water before putting it into the teapot.
Step 4. You may use the content of a teapot for up to three services. After the first service, follow Steps 1-3 for the second and third services. However, now you should serve the tea immediately after you pour the water inside the teapot. Waiting makes your tea taste bitter.