The "Ten Virtues of Koh" is a list of the benefits derived from the use of incense. These Ten Virtues have been passed down from the 15th century (the Muromachi Era) and are still cited today as uniquely capturing the spirit of Koh (incense).
Brings communication with the transcendent.
Purifies mind and body.
Keeps one alert.
Can be a companion in the midst of solitude.
Brings a moment of peace in the midst of busy affairs.
One never becomes tired of it even if there is plenty of it.
One is satisfied even though there is little of it.
Does not change its efficacy.
Does no harm even if used every day.
After these Ten Virtues were established, Koh gradually evolved away from the sophisticated elegance of the courtier and acquired a character of discipline, the way of Koh (Koh-Do).