

For this reason, even in Japan's indigenous culture can find more of the architectural elements related to the same concepts. The torii, for example, the typical portal above the entrance of Shinto shrines, attracts the same principles from the ancient Chinese civilization. The rules of construction, dictated by the great Japanese artist Katsushika Hokusai (1760 - 1849) in one of his writings, shows this interpretation in the cosmological relationship between symbolism and architecture of a torii.

analysis of the text we see that the five colors (WU SE - 五色) divide the space of the beam located under the roof (Shimako): Black, White, Yellow, Red and Green. Also the number five is represented in the subdivision of the beam below (Nuki) by Five Movements or Agents (WU XING - 五行): Water (SHUI - 水), Metal (JIN - 金), Terra (TU - 土) Fire (HUO - 火) and Wood (MU - 木). The two pillars (Hashira) that support the structure, are the two basic energies, the yin and yang. These two columns demarcate, in combination with the ground (Earth) and the beam above (Heaven), a perfect square, whose sides recall the four mythical animals (the Phoenix, the Tiger, the Dragon and the Turtle). At the four corners represent the four seasons (SI SHI - 四时) Spring (Chun - 春), Summer (XIA - 夏) Autumn (Qiu - 秋) and Winter (DONG - 冬).
the side you see a section of the octagonal base (Nemak) on which rest the pillars. The octagon represents the Eight Trigrams (BAGUA - images composed of three whole or broken lines, from which we get the 64 hexagrams dell'YIJING) represented here only by the characters and places in the order of the Later Heaven: QIAN, KUN, GEN, KAN, Xun, Zhen, LI and DUI.
Always laterally and above the octagon, is drawn into the section of beam that holds up the roof, a rectangle divided into three parts that are assigned to the signs: Five Movements, Three Figures and Two Lights Elementary.
The beam holding the roof in turn calls the classic definition (according to the Imperial Kangxi Dictionary) TAI JI, "Big Ridge" (or Large Apex) and the concept of internal and external. Outside (WEI) look at the roof and its height. From inside (IN), our eye falls on the elements of architecture. Like Yin and Yang (the characters and the representations are the oldest wall in the shade and the sun, a mountain) supports and nourishes the Yin Yang, in turn, protects the YIN YANG, like the roof protects the beam. Beyond the "Big Hum", the link with the TAO.
PS: the concepts of cosmology are written in Chinese pinyin, the structural elements of the torii are in Japanese. The text was drawn from an article by Nicholas PICCIOLO appeared years ago in the journal "Arts of the Orient" and from which I took with both hands. The mention of "Imperial Kangxi Dictionary" is by George Charles. Thank you both.