Input (grade 11): Koicha, or thick tea, requires significantly more matcha; approximately 3.75 grams for one serving, Japanese on-line encyclopedia entry on koicha, by Japanese tea historian or as many as six teaspoons to 3/4 cup of water.
Output (grade 4): Koicha, or thick tea, needs much more matcha, as many as six teaspoons to 3/4 cup of water.