Question: What traditional Japanese gate is located in front of one of the castle gates?

full_context: Document 1: Ardrossan Castle: Ardrossan Castle is situated on the west coast of Scotland in the town of Ardrossan, Ayrshire. The castle, defended by a moat, stands on a ridge above the town. There is a keep dating from the fifteenth century, and a vaulted range containing a kitchen and cellars. In a deep passageway there is a well. Part of the keep remains up to the corbels of the parapet, but it is in ruins. The original castle, owned by Clan Barclay, was partly destroyed during the Wars of Scottish Independence. This event, in which the English garrison were slaughtered, became known as "Wallace's Larder," a name which is still applied to the remaining vaults. Rebuilt by Clan Montgomery in the 15th century, Ardrossan later fell into disuse and was partially demolished by the soldiers of Oliver Cromwell in the 17th century who used the stones to help construct the Ayr Citadel.
Document 2: Iwatsuki Castle: Iwatsuki Castle (岩槻城 , Iwatsuki-jō ) is a Japanese castle located in Iwatsuki-ku, Saitama, in Saitama Prefecture, Japan. At the end of the Edo period, Tateyama Castle was home to the Ōoka clan, "daimyō" of Iwatsuki Domain, however the castle dates from the Muromachi period and was inhabited by many samurai lords over its history. During the Edo period, the name of the castle was written as “岩付城”. It was also known as "White Crane Castle" (白鶴城 , Hakutsuru-jō ) or "Floating Castle" (浮城 , Uki-jō ) . The site of the castle is a Saitama Prefectural Historic Monument.
Document 3: Omizutori: Omizutori (お水取り), or the annual, sacred water-drawing festival, is a Japanese Buddhist festival that takes place in the Nigatsu-dō of Tōdai-ji, Nara, Japan. The festival is the final rite in observance of the two-week-long Shuni-e ceremony. This ceremony is to cleanse the people of their sins as well as to usher in the spring of the new year. Once the Omizutori is completed, the cherry blossoms have started blooming and spring has arrived.
Document 4: Kumamoto Castle: Kumamoto Castle (熊本城 , Kumamoto-jō ) is a hilltop Japanese castle located in Chūō-ku, Kumamoto in Kumamoto Prefecture. It was a large and well fortified castle. The castle keep (天守閣 , "tenshukaku" ) is a concrete reconstruction built in 1960, but several ancillary wooden buildings remain of the original castle. Kumamoto Castle is considered one of the three premier castles in Japan, along with Himeji Castle and Matsumoto Castle. Thirteen structures in the castle complex are designated Important Cultural Property.
Document 5: Wolgast Castle: Wolgast Castle was a Castle in the city of Wolgast in the northeast of today's Mecklenburg-Vorpommern. It was located on a small barrier island in the Peenestrom, the strait which separates Usedom island from the mainland. The island is still called "Castle Island". The castle was one of the most important Renaissance buildings in Northern Germany. It existed from 1496, when it replaced an earlier castle on the island, until it was demolished in the 1820s. After it was demolished, the materials were used to constrcut other building, so no ruins exist. Only a few items from the castle have been preserved in various exhibitions. A reminder of the castle is the coat of arms of the city of Wolgast, which shows a castle tower between two griffins.
Document 6: Hiji Castle: Hiji Castle (日出城 , Hiji-jō ) , also known as Yokoku Castle, Aoyagi Castle, and Ukitsu Castle, is a castle located in Hiji, Oita Prefecture, Japan. The construction of the castle began in 1601, under Kinoshita Nobutoshi's orders, when he was transferred to Hiji from Himeji. The castle was designed by Nobutoshi's brother-in-law, Hosokawa Tadaoki. It holds a strategic location, as it overlooks Beppu Bay. Today, the castle's ruins (all that remains are the stone walls and the Sumi "yagura") are a park, though Hiji Elementary School is also located on the grounds.
Document 7: Iha Castle: Iha Castle (伊波城 , Iha jō ) is a Ryukyuan "gusuku" in Uruma, Okinawa. It sits on a cliff that separates Iha from Ishikawa, with a grand view of the Ishikawa Isthmus. The castle is in ruins, with nothing left of the original structures save the walls. There are also multiple Ryukyuan shrines in the bailey. Based on artifacts found in and around the castle, it has been estimated to have been in use around the 13th to 15th centuries. The Okinawa Prefectural government erected a stone Torii in front of one of the castle gates, along with a plaque describing it.
Document 8: Niōmon: The niōmon (仁王門 , lit. Niō gate ) is the Japanese name of a Buddhist temple gate guarded by two wooden warriors called Niō (lit. Two Kings). The gate is called Heng Ha Er Jiang (哼哈二将) in China and Geumgangmun (金剛門) in Korea. The two statues are inside the two posts of the gate itself, one at the left, one at the right. Structurally, it usually is either a "rōmon" or a "nijūmon" and can measure either 5x2 or 3x2 "bays". It can sometimes have just one story, as in the case of Asakusa's Kaminarimon.
Document 9: Torii: A torii (鳥居 ) is a traditional Japanese gate most commonly found at the entrance of or within a Shinto shrine, where it symbolically marks the transition from the profane to sacred.
Document 10: Sagiyama Castle: Sagiyama Castle (鷺山城 , Sagiyama-jō ) was a castle built in Mino Province in Japan during the late-Heian period (late 12th century); it was destroyed during the Sengoku period in the mid-16th century. The castle's ruins are located in the present-day city of Gifu, Gifu Prefecture. It stood at the peak of Mount Sagi, which was only 68 m . Because the castle was built as a residence and not a defensive fortress, its location on a small mountain was of little consequence.
Document 11: Tōrō: In Japan a tōrō (灯籠 or 灯篭, 灯楼 , light basket, light tower ) is a traditional lantern made of stone, wood, or metal. Like many other elements of Japanese traditional architecture, it originated in China; however, extant specimens in that country are very rare, and in Korea they are not as common as in Japan. In Japan, "tōrō" were originally used only in Buddhist temples, where they lined and illuminated paths. Lit lanterns were then considered an offering to Buddha. During the Heian period (794–1185), however, they started being used also in Shinto shrines and private homes.
Document 12: Gate: A gate or gateway is a point of entry to a space which is enclosed by walls. Gates may prevent or control the entry or exit of individuals, or they may be merely decorative. Other terms for gate include yett and port. The word derives from the old Norse "gata", meaning road or path, and originally referred to the gap in the wall or fence, rather than the barrier which closed it. The moving part or parts of a gateway may be called "doors", but used for the whole point of entry door usually refers to the entry to a building, or an internal opening between different rooms.
Document 13: Torii Station: US Army Garrison Okinawa is a United States Army facility located in Yomitan, Okinawa Prefecture, Japan. Home to the United States Army on Okinawa, 10th Support Group (Regional), along with the 1st Battalion, 1st Special Forces Group (Airborne), 247th MP DET, and the 349th Signal Company (78th SIG BN) provide support to all other services on island. Formerly named 'Torii Station', the garrison was re-designated in March 2014.
Document 14: Izumo-taisha: Izumo-taisha (出雲大社 , "Izumo Grand Shrine") , officially Izumo Ōyashiro, is one of the most ancient and important Shinto shrines in Japan. No record gives the date of establishment. Located in Izumo, Shimane Prefecture, it is home to two major festivals. It is dedicated to the god Ōkuninushi (大国主大神, "Ōkuninushi-no-ōkami"), famous as the Shinto deity of marriage and to Kotoamatsukami, distinguishing heavenly "kami". The shrine is believed by many to be the oldest Shinto shrine in Japan, even predating the Ise Grand Shrine.
Document 15: Dunluce Castle: Dunluce Castle (from Irish: "Dún Libhse" ) is a now-ruined medieval castle in Northern Ireland. It is located on the edge of a basalt outcropping in County Antrim (between Portballintrae and Portrush), and is accessible via a bridge connecting it to the mainland. The castle is surrounded by extremely steep drops on either side, which may have been an important factor to the early Christians and Vikings who were drawn to this place where an early Irish fort once stood.
ground_truth: Torii