Question: What were Diamond and Shogun?

Context articles: Ashikaga Yoshinori
Gokenin
Diamond (game)
Shōgun
Dutch missions to Edo
Shogun (1986 board game)
Ashikaga Yoshiteru
Beyblade: Shogun Steel
Kantō kubō
Kō no Moronao

Ashikaga Yoshinori (足利 義教 , July 12, 1394 – July 12, 1441) was the 6th shogun ("rokudai shogun") of the Ashikaga shogunate who reigned from 1429 to 1441 during the Muromachi period of Japan.
 Yoshinori was the son of the third shogun Ashikaga Yoshimitsu.
His childhood name was Harutora (春寅).
A gokenin (御家人 ) was initially a vassal of the shogunate of the Kamakura and the Muromachi periods.
 In exchange for protection and the right to become "shugo" (governor) or "jitō" (manor's lord), in times of peace a "gokenin" had the duty to protect the imperial court and Kamakura, in case of war had to fight with his forces under the shogun’s flag.
 From the middle of the thirteenth century, the fact that "gokenin" were allowed to become "de facto" owners of the land they administered, coupled to the custom that all "gokenin" children could inherit, brought to the parcelization of the land and to a consequent weakening of the shogunate.
 The "gokenin" class ceased to be a significant force during the Muromachi period and was supplanted by the figure of the "daimyō".
 During the successive Edo period, the term finally came to indicate a direct vassal of the shogun below an "omemie" (御目見 ) , meaning that they did not have the right to an audience with the shogun.
Diamond is a two-player abstract strategy board game invented by Larry Back.
 The invention was inspired by the game Kensington, which uses a similar board pattern and game objective.
 Rules for Diamond were conceived in 1985 and finalized in 1994.
 Diamond introduces a new board geometry and neutral pieces, with the aim of enhancing the game dynamic and lowering the potential for draws.
A shōgun (将軍 ) was the military dictator of Japan during the period from 1185 to 1868 (with exceptions).
 In most of this period, the shoguns were the "de facto" rulers of the country, although nominally they were appointed by the Emperor as a ceremonial formality.
 The Shogun held almost absolute power over territories through military means.
 Nevertheless, an unusual situation occurred in the Kamakura period (1199–1333) upon the death of the first shogun, whereby the Hōjō clan's hereditary titles of "shikken" (1199-1256) and "tokusō" (1256–1333) monopolized the shogunate as dictatorial positions, collectively known as the "Regent Rule" (執権政治 ) .
 The shogun during this 134-year period met the same fate as the Emperor and was reduced to a figurehead until a coup in 1333, when the Shogun was restored to power in the name of the Emperor.
The Dutch East India Company missions to Edo were regular tribute missions to the court of the Tokugawa Shogun in Edo (modern Tokyo) to reassure the ties between the Bakufu and the "Opperhoofd".
 The "Opperhoofd" of the Dutch factory in Dejima and his attendants were escorted by the Japanese to Edo where they presented exotic and elaborate gifts to the Shogun: clocks, telescopes, medicines, artillery and rare animals were usual gifts of the tribute missions.
 The Shogun would correspond at the same time with gifts to the Dutch.
 The tribute system, as in China, served to enhance the idea of the Shogun's supremacy to his subjects.
Shogun, designed by Michael Gray, was a board wargame first released in 1986 by game maker Milton Bradley as part of their Gamemaster series.
 It was renamed to Samurai Swords in its first re-release (1995) to disambiguate it from other games with the same name (in particular, "James Clavell's Shogun", a wargame with a similar theme, released in 1983), and renamed again to Ikusa in its 2011 re-release under Hasbro's Avalon Hill banner.
 Set in feudal Japan, two to five players take control of a fictional warlord and pit their armies against one another in hopes of winning the title Shogun.
Ashikaga Yoshiteru (足利 義輝 , March 31, 1536 – June 17, 1565) , also known as Yoshifushi or Yoshifuji, was the 13th shogun of the Ashikaga shogunate who reigned from 1546 to 1565 during the late Muromachi period of Japan.
 He was the eldest son of the 12th shogun, Ashikaga Yoshiharu; and his mother was a daughter of Konoe Hisamichi (later called 慶寿院 "Keijuin").
 When he became shogun in 1546 at age 11, Yoshiteru's name was Yoshifushi (sometimes translated as Yoshifuji); but some years later in 1554, he changed his name to the one by which he is conventionally known today.His childhood name was Kikubemaru (菊童丸).
 His younger brother Ashikaga Yoshiaki would become the fifteenth shogun.
Beyblade: Shogun Steel, known in Japan as Metal Fight Beyblade Zero-G (メタルファイトベイブレード ZERO-G , Metaru Faito Beiburēdo ZERO-G ) is a Japanese manga by Takafumi Adachi based on Takara Tomy's spinning top toy line.
 It is also an anime that aired on TV Tokyo beginning April 8, 2012 and Cartoon Network starting in mid-August 2013.
 Shogun Steel is the seventh in the line of Beyblade shows, following the trilogy of shows started with "".
 Whereas the previous shows focused on metal parts, the line of Beyblades in Shogun Steel will focus on zero gravity battles with the advent of a new stadium system.
Kantō kubō (関東公方 ) (also called "Kantō gosho" (関東御所 ) , "Kamakura kubō" (鎌倉公方 ) , or "Kamakura gosho" (鎌倉御所 ) ) was a title equivalent to shogun assumed by Ashikaga Motouji after his nomination to "Kantō kanrei", or deputy shogun for the Kamakura-fu, in 1349.
 Motouji transferred his original title to the Uesugi family, which had previously held the hereditary title of "shitsuji" (執事 ) , and would thereafter provide the "Kantō kanrei".
 The Ashikaga had been forced to move to Kyoto, abandoning Kamakura and the Kantō region, because of the continuing difficulties they had keeping the Emperor and the loyalists under control (see the article Nanboku-chō period).
 Motouji had been sent by his father, shogun Ashikaga Takauji, precisely because the latter understood the importance of controlling the Kantō region and wanted to have an Ashikaga ruler there, but the administration in Kamakura was from the beginning characterized by its rebelliousness.
 The shogun's idea never really worked and actually backfired.
Kō no Moronao (高 師直 , ?
 – 25 March 1351, also Moronō) was a Japanese samurai of the Nanboku-chō period who was the first to hold the position of "Shitsuji" (Shogun's Deputy).
 He was appointed by Ashikaga Takauji, the first shogun of the Ashikaga shogunate.
 As Deputy, he served not only an administrative governmental function, but also as general of the Shogun's armies.
 He fought for the Ashikaga against the loyalist forces of the Southern Court during the wars of the Nanboku-chō period and killed its generals Kitabatake Akiie and Kusunoki Masayuki.