The roji was developed from its highly rarefied beginnings into a garden-like space intended to evoke the feeling of the aforementioned "hermitage in the city." This required that the garden contain nothing that would "catch the eye of the guest" (disturb their concentration): no special trees, no flowering plants, no special garden rocks.
Within the context of Zen Buddhism, the tea gathering was seen as a means
of developing a perception beyond day-to-day reality and the roji was seen
as a path outside of that reality ("the path beyond the transient world").
In fact, the word roji is found in the Lotus Sutra in which it refers to
a green, "natural" place (Sanskrit, abhyavakasika; symbolizing
the enlightened world) in opposition to the kataku, "burning house" (Sanskrit, adiptagara;
symbolizing the unenlightened world)
Important Components of a Roji
• Outer Gate (soto mon)
Defines the threshold between the "outer," profane world, and the "inner," sanctified
space.
• Waiting Bench (koshi-kake machiai)
Simulates a place to rest partway along a journey away from town toward a mountain
hermitage. Functionally it allows guests a chance to pause and prepare themselves,
inwardly and outwardly.
• Middle Gate (chumon)
In a "two-layer" garden (niju-roji), the middle gate separates the
inner and outer portions. It is not a functional, protective gate, but rather
a symbolic marker of passage.
• Water Laver (tsukubai, chozubachi)
Usually made of carved granite (sometimes a natural bowl-shaped stone, or a
wooden bucket), the water laver allows guests to ritually cleanse their hands
and mouth before entering the tea house.
• "Dust" Pit (chiri-ana)
The "dust" pit was a functional element of gardens in which swept
garden debris would be temporarily stored. In the tea garden, the host places
an evergreen branch and a pair of "twig-pickers" (chirihashi, large,
fresh-bamboo chopsticks) in the dust pit symbolizing the preparations he or
she has made for the gathering.