The law of yo hitsu requires a free and skilful handling of the brush, always with strict attention to the stroke, whether dot, line or mass is to be made; the brush must not touch the silk or paper before reflection has determined what the stroke or dot is to express. Neither negligence nor indifference is tolerated.

An artist, be he ever so skilful, is cautioned not to feel entirely satisfied with his use of the brush, as it is never perfect and is always susceptible of improvement. The brush is the handmaid of the artist's soul and must be responsive to his inspiration. The student is warned to be as much on his guard against carelessness when handling the brush as if he were a swordsman standing ready to attack his enemy or to defend his own life; and this is the reason: Everything in art conspires to prevent success. The softness of the brush requires the stroke to be light and rapid and the touch delicate. The brush, when dipped first into the water, may absorb too much or not enough, and the sumi or ink taken on the brush may blot or refuse to spread or flow upon the material, or it may spread in the wrong direction. The Chinese paper (toshi) which is employed in ordinary art work may be so affected by the atmosphere as to refuse to respond, and the brush stroke must be regulated accordingly. All such matters have to [pg 34] be considered when the brush is being used, and if the spirit of the artist be not alert, the result is failure. (it ten ichi boku ni chiu o su beki.)

Vehicle of the subtle sentiment to be expressed in form, the brush must be so fashioned as to receive and transmit the vibrations of the artist's inner self. Much care, much thought and skill have been expended in the manufacture of the brush.

In China, the art of writing preceded painting, and the first brushes made were writing brushes, and the more writing developed into a wonderful art, the more attention was bestowed upon the materials composing the writing brush. Such brushes were originally made with rabbit hair, round which was wrapped the hair of deer and sheep, and the handles were mulberry stems. Later on, as Chinese characters became more complex and writing more scientific, the brushes were most carefully made of fox and rabbit hair, with handles of ivory, and they were kept in gold and jeweled boxes. Officials were enjoined to write all public documents with brushes having red lacquer handles, red being a positive or male (yo) color. Ogishi, the greatest of the Chinese writers, used for his brushes the feelers from around the rat's nose and hairs taken from the beak of the kingfisher.

In Japan, hair of the deer, badger, rabbit, sheep, squirrel, and wild horse all enter into the manufacture of the artist's brush, which is made to order, long or short, soft or strong, stiff or pliable. For laying on color, the hair of the badger is preferred. The sizes and shapes of brushes used differ [pg 35] according to the subject to be painted. There are brushes for flowers and birds, human beings, landscapes, lines of the garments, lines of the face, for laying on color, for shading, et cetera.

A distinguishing feature in Japanese painting is the strength of the brush stroke, technically called fude no chikara or fude no ikioi. When representing an object suggesting strength, such, for instance, as a rocky cliff, the beak or talons of a bird, the tiger's claws, or the limbs and branches of a tree, the moment the brush is applied the sentiment of strength must be invoked and felt throughout the artist's system and imparted through his arm and hand to the brush, and so transmitted into the object painted; and this nervous current must be continuous and of equal intensity while the work proceeds. If the tree's limbs or branches in a painting by a Kano artist be examined, it will astonish any one to perceive the vital force that has been infused into them. Even the smallest twigs appear filled with the power of growth—all the result of fude no chikara. Indeed, when this principle is understood, and in the light of it the trees of many of the Italian and French artists are critically viewed, they appear flabby, lifeless, and as though they had been done with a feather. They lack that vigor which is attained only by fude no chikara, or brush strength.

In writing Chinese characters in the rei sho manner this same principle is carefully inculcated. The characters must be executed with the feeling of their being carved on stone or engraved on [pg 36] steel—such must be the force transmitted through the arm and hand to the brush. Thus executed the writings seem imbued with living strength.

It is related of Chinanpin, the great Chinese painter, that an art student having applied to him for instruction, he painted an orchid plant and told the student to copy it. The student did so to his own satisfaction, but the master told him he was far away from what was most essential. Again and again, during several months, the orchid was reproduced, each time an improvement on the previous effort, but never meeting with the master's approval. Finally Chinanpin explained as follows: The long, blade-like leaves of the orchid may droop toward the earth but they all long to point to the sky, and this tendency is called cloud-longing (bo un) in art. When, therefore, the tip of the long slender leaf is reached by the brush the artist must feel that the same is longing to point to the clouds. Thus painted, the true spirit and living force (kokoromochi) of the plant are preserved.

Kubota recommended to art students and artists to a practice with lines which is excellent for acquiring and retaining firmness and freedom of the arm, with steady and continuous strength in the stroke. With a brush held strictly perpendicular to the paper horizontal lines are painted, first from right to left, the entire width of the toshi or other paper, each line with equal thickness and unwavering intensity of power throughout its entire length. The thickness of the line will depend upon the amount of hair in the brush that is allowed to [pg 37] touch the paper; if only the tip of the brush be used, the line will be slender or thin; but, whether a broad band or a delicate tracing, it must be uniform throughout and filled with living force. Next, the lines are painted from left to right in the same way and with the same close attention to uniform thickness and continuous flow of nervous strength from start to finish. Then, the increasingly difficult task is to paint them from top to bottom of the toshi, and finally, most difficult and most important of all these exercises, the parallel lines are traced from bottom to top of the paper. The thinner the line the more difficult it is to execute, because of the tendency of the hand to tremble. Indeed, the difficulty is supreme. Let any one who is interested try this; it is an exercise for the most expert. Such lines resemble the sons filés on the violin, where a continuous sustained tone of equal intensity is produced by drawing the bow from heel to tip so slowly over the strings that it hardly moves. Practicing lines in the way indicated gives steadiness and strength, qualities in demand at every instant in Japanese art. Observe a Japanese artist paint the young branch of a plum tree shooting from the trunk. The new year's growth starting, it may be, from the bottom of the toshi will be projected to the top. Examine it carefully and it will be found to conform to that principle of jude no chikara which transfers a living force into the branch. I have seen European artists in Japan vainly try offhand to produce such effects; but these depend on long and patient practice.

A Japanese artist will frequently ignore the boundaries of the paper upon which he paints by beginning his stroke upon the mosen and continuing it upon the paper—or beginning it upon the paper and projecting it upon the mosen. This produces the sentiment or impression of great strength of stroke. It animates the work. And in this energetic kind of painting, if drops of sumi accidentally fall from the brush upon the painting they are regarded as giving additional energy to it. Similarly, if the stroke on the trunk or branch of a tree shows many thin hair lines where the intention was that the line should be solid, this also is regarded as an additional evidence of stroke energy and is always highly prized.