喫茶養生記（Kissa Yojoki）
Kissa Yojoki is the oldest tea book in Japan written by Eisai . Eisai was a Zen monk active during the Kamakura period who played an important role in the history of tea. At the age of 71 , Eisai passed on to the sect and conveyed the teachings of Zen Buddhism to Japan. This book had a great influence on the tea culture of the time, and contributed greatly to the spread and development of tea. In Kenji 2 ( 1202 ), Eisai built Kennin-ji Temple in Kyoto to mourn Minamoto no Yoritomo's death, and in Kenpo 2 ( 1214 ), he promoted tea as a good medicine to Minamoto no Sanetomo and presented him with a book called "Kissa Yojoki."
Tea is a herbal medicine for health, a magic to prolong life
Kissa Yojoki consists of two volumes, the first volume `` Gozowagomon '' and the second volume `` Denyokekiimimon '' , and describes the efficacy of tea for human physical health and mental stability.
五臓和合門
It is said that tea harmonizes the five organs (heart, liver, spleen, lungs, and kidneys) in the body and regulates physical condition.
遣除鬼魅門
Tea has a calming and tranquilizing effect and is said to play an important role in Zen practice and meditation.
Benefits of tea described in Kissa Yojoki
Concentration/relaxation effect
Drinking tea is said to have a calming and calming effect. The caffeine contained in tea and theanine, which is a type of amino acid, are thought to bring about concentration and relaxation effects.
detoxification
It is said that the ingredients contained in tea promote the work of discharging harmful substances in the body. Green tea, in particular, has antioxidant properties and is said to be effective in reducing oxidative stress in the body.
diuretic
Tea has a diuretic effect, and is said to help the body expel excess water and waste products. This is believed to improve swelling and promote cleansing of the body.
Digestive
Tea has a function to aid digestion, and it is said that drinking tea after meals has the effect of activating the function of the gastrointestinal tract.