Higashi Taifûmon 東大風門

The Great Wind Gate of the East

Crafted by ancient Yamato Ur-soulism worshipers in 52 AID, this gargantuan torii was built between the islands of Chagoku 茶国 and Kodama 小玉 as one of the greatest feats of Yamato magic to this day. Though lagging behind significantly in magical sophistication compared to the Middle Lands these days, students at the Rickard Leeuw Magistorium still go on excursions to the Shôwa Shotô to behold the wondrous monument themselves.
Still active and working, ships that sail westward through the gate are accelerated by a powerful channel of wind that carries them all the way to Hammerhead.
The gate was constructed because the distance between the Lower Yamato Islands and the Anvil Islands is quite significant, making sea travel between them difficult.

— From the Aqualon Grand World Atlas, 2nd Edition

Torii in Yamato Culture

The Torii, written with the characters "bird" and "to reside" (鳥居), is a traditional Yamato structure. Generally it appears in the shape of a wooden arch consisting of two straight pillars holding up a slightly downward curved roof.
They are often used to demarcate areas of intense spiritual energy where soothsayers and priests have supposedly detected a thin barrier between this world and the spirit world, a layer that sometimes eases and sometimes hinders the passage of souls from this world to the Great Clockwork.
During the golden age of Yamato magic in the Age of the Iron Divide, magical torii were created by powerful priests and shrine maidens to serve as elemental receptacles during the height of Ur-Soulism. Unlike the classical torii, which were painted red, these magical torii sported colorful patterns symbolizing their corresponding element.
The Higashi Taifûmon, however, the most powerful wind torii ever constructed, was painted in the classical red, symbolizing that the wide ocean was the true home of the Ur-Soul of Wind.

The Wind Magic of Yore

The magic of the Higashi no Taifûmon lies in its ritualistic components: thick ropes tied around the bases of its pillars, braided by hundreds of shrine maidens, prayer tags, written with calligraphic characters by the most powerful priests of their time, and engravings, skillfully wrought by master carpenters of Yamato.
Objects, on their own, can never produce magical effects, because magic requires souls. There have been many attempts to find magical signs, runes, or geometric shapes that, on their own, siphon magical energy directly from the five Ur-Souls, but none to any avail. However, there have been ways to create permanent magical objects since the days of the Albenmannen, long before spell ink was invented in the Middle Lands: By shaving small pieces of one's own soul and imbuing them into the object one was crafting.
The Higashi Taifûmon is especially brilliant in the application of this principle, because ever strand of every rope and every tag plastered over the pillars each hold a minuscule sliver of the souls that worked on them. Tiny echos of the souls of shrine maidens, priests, and carpenters have been wrought into the wood, rope, and paper, and they keep the magic active perpetually, acting as a continuous trigger that taps into the Ur-Soul of Wind.