Question: The Nanboku-chō period armor at Kasuga-taisha is associated with a warrior who served which Japanese emperor ?

text: List of National Treasures of Japan (crafts: others)
Treasures -- Armour
Armour has been employed in battles in Japan since the Yayoi period . Some of the oldest extant items from the 4th to the 7th centuries were excavated from kofun and have been designated as archaeological National Treasures . These ancient armours were of two types : a tight fitting solid plate cuirass ( tankō ) and a skirted lamellar type ( keikō ) , both believed to be based on Chinese or Korean prototypes . [ 135 ] [ 136 ] [ 137 ] This list includes more recent pieces of armour , developed as result of a trend toward ( lamellar ) scale armour that began in Japan in the 6th to the 7th centuries and matured in the mid-Heian period ( 9th to 10th centuries ) . [ 138 ] Combining materials such as leather and silk with iron or steel parts , these armours had the advantage of being light , flexible , foldable and shock absorbent . They were generally lacquered to protect them from the humid climate and were used widely from the late Heian period to the mid-14th century . [ 136 ] [ 138 ] [ 139 ] [ 140 ] A complete set consisted of a helmet , mask , neck guard , throat protector , breastplate with shoulder guards , sleeve armour , skirt , greaves , shoes and a pennant attached to the back . [ 141 ] [ 142 ] During this time , there were two popular kinds of armour : the ō-yoroi ( lit . `` great armour '' ) with a boxlike appearance , mainly worn by high-ranking samurai on horseback , and the lighter and more flexible dō-maru that wrapped around the body and was initially worn by lower-ranking foot soldiers . [ 143 ] [ 144 ] [ 145 ] The ō-yoroi was made of leather and iron lames bound together in horizontal layers , ornamented and reinforced with leather , silk and gilt metal . [ 140 ] It originated around the 10th century but was only commonly used starting with the Genpei War at the end of the 12th century . [ 146 ] Being the most complete and elaborate Japanese armour , it was also worn for ceremonies . [ 147 ] The tighter fitting dō-maru , developed in the 11th century , was generally made of a combination of leather and metal and did not include a solid breastplate or sleeves . [ 145 ] [ 146 ] In many cases its armour plates were replaced with scales of metal , leather or whalebone laced together with silk or leather cords . [ 148 ] Even though it was a plainer armour compared to the ō-yoroi , upper class samurai started to adopt it around 1300 , as battles began to be fought on foot favouring a more comfortable suit . [ 143 ] [ 146 ] [ 149 ] Three dō-maru , fifteen ō-yoroi armours and one pair of gauntlets have been designated as National Treasures . Most of the items include a helmet and large sleeve protectors . [ 4 ]
The term National Treasure has been used in Japan to denote cultural properties since 1897,
although the definition and the criteria have changed since the introduction of the term. The crafts items in the list adhere to the current definition and have been designated National Treasures according to the Law for the Protection of Cultural Properties that came into effect on June 9, 1951. The items are selected by the Ministry of Education, Culture, Sports, Science and Technology based on their especially high historical or artistic value. The list presents 131 entries from Classical to early modern Japan, spanning from the 7th century Asuka to the 18th century Edo period. The number of items is higher, however, since groups of related objects have been joined as single entries. The listed objects are of many types and include household goods, objects related to Buddhism, armour and harnesses. Some of the oldest objects were imported from China at the time. The listed items consist of materials such as wood over clay or to bronze. Often the articles were decorated using a variety of artistic techniques like gilding of precious metals, line engraving, maki-e, mother of pearl inlay or lacquer. The objects are housed in Buddhist temples, Shinto shrines or museums. The objects in this list represent about half of the 253 National Treasures in the category crafts. They are complemented by 110 swords and 12 Japanese sword mountings National Treasures of the List of National Treasures of Japan (crafts: swords).
Name Remarks Date Type Present location
Armour laced with red threads ( 赤絲威鎧 , akaitōdoshi yoroi ) Helmet and large sleeves with chrysanthemum motif ; also known as kiku ichimonji no yoroikabuta ( 菊一文字の鎧兜 ) ; nomination includes the helmet and a Chinese style chest ( 唐櫃 , karabitsu ) 1185 late Kamakura period Ō-yoroi Aomori Hachinohe Kushibiki Hachimangu Kushibiki Hachiman-gū ( 櫛引八幡宮 ) , Hachinohe , Aomori
Armour with white triangular-pattern thread lacing ( 白絲威褄取鎧 , shiroitōdoshi tsumadori yoroi ) Nomination includes the helmet , cuirass , skirt and a Chinese style chest ( 唐櫃 , karabitsu ) 1336 late Nanboku-chō period , 14th century Ō-yoroi ; iron , copper , gold , leather , lacquer , and silk ; height of helmet bowl : 13.5 cm ( 5.3 in ) , cuirass height : 32.5 cm ( 12.8 in ) , skirt height : 29.5 cm ( 11.6 in ) Aomori Hachinohe Kushibiki Hachimangu Kushibiki Hachiman-gū ( 櫛引八幡宮 ) , Hachinohe , Aomori
Armour laced with red threads ( 赤絲威鎧 , akaitōdoshi yoroi ) Nomination includes the helmet ; dedicated by Hatakeyama Shigetada in 1191 1100 late Heian period Ō-yoroi Tokyo Ome Musashi Mitake Shrine Musashi Mitake Shrine ( 武蔵御嶽神社 ) , Ōme , Tokyo
Black dōmaru armour laced with leather cords ( 黒韋威胴丸 , kuro kawaodoshi dōmaru ) Nomination includes the helmet and ōsode ( 大袖 ) ( long sleeves ) 1400 Muromachi period , 15th century Dō-maru Nara Nara Kasuga Taisha Kasuga-taisha , Nara , Nara
Armour laced with red threads ( 赤絲威鎧 , akaitōdoshi yoroi ) With bamboo , tiger , sparrow motif ; nomination includes the helmet ; said to have been dedicated by Minamoto no Yoshitsune ; one of two similar armours at Kasuga-taisha 1185 Kamakura period Ō-yoroi Nara Nara Kasuga Taisha Kasuga-taisha , Nara , Nara
Armour laced with red threads ( 赤絲威鎧 , akaitōdoshi yoroi ) With plum and Japanese bush-warbler motif ; nomination includes the helmet ; one of two similar armours at Kasuga-taisha 1185 Kamakura period Ō-yoroi Nara Nara Kasuga Taisha Kasuga-taisha , Nara , Nara
Armour laced with red threads ( 赤絲威鎧 , akaitōdoshi yoroi ) Nomination does not include the helmet ; said to have been dedicated by Minamoto no Yoshitsune 0794 Heian period Ō-yoroi Ehime Imabari Oyamazumi Shrine Ōyamazumi Shrine , Imabari , Ehime
Black dōmaru armour laced with leather cords ( 黒韋威矢筈札胴丸 , kuro kawaodoshi yahazuzane dōmaru ) Offered by Kusunoki Masashige ; nomination includes the helmet 1336 late Nanboku-chō period Dō-maru ; laced with leather cords ( kawaodoshi ) Nara Nara Kasuga Taisha Kasuga-taisha , Nara , Nara
Armour laced with white threads ( 白絲威鎧 , shiroitōdoshi yoroi ) Nomination includes the helmet 1300 late Kamakura period Ō-yoroi Shimane Izumo Hinomisaki Shrine Hinomisaki Shrine ( 日御碕神社 ) , Izumo , Shimane
Armour with cherry-patterned leather lacing ( 小桜韋威鎧 , kozakura kawaodoshi yoroi ) Handed down in the Takeda clan ; also called tatenashi yoroi ( 楯無鎧 , lit . nospear cuirass or shieldless or armour that needs not shield ) ; nomination includes the helmet 1100 late Heian period Ō-yoroi ; lacing pattern of cherry blossoms printed on leather ( kozakura ) , laced with leather cords ( kawaodoshi ) Yamanashi Koshu Kandaten Shrine Kandaten Shrine ( 菅田天神社 ) , Kōshū , Yamanashi
Red leather armour laced with leather cords ( 赤韋威鎧 , aka kawaodoshi yoroi ) Nomination includes the helmet 1100 late Heian period Ō-yoroi ; black lacquered iron and leather kozane ( 小札 ) ( c. 1800 small scales laced together with leather cords ( kawaodoshi ) ) , metal plates for the helmet ; torso height : 40 cm ( 16 in ) ( front ) , 44 cm ( 17 in ) ( back ) ; circumference : 91 cm ( 36 in ) , tassets height : 27 cm ( 11 in ) , helmet height : 13.3 cm ( 5.2 in ) , diameter : 20 cm ( 7.9 in ) , large sleeves : 46 cm × 33 cm ( 18 in × 13 in ) , weight c. 25 kg ( 55 lb ) Okayama Okayama Okayama Prefectural Museum Okayama Prefectural Museum , Okayama , Okayama
Armour with cherry-patterned yellow leather lacing ( 小桜韋黄返威鎧 , kozakura kawa kigaeshi odoshi yoroi ) Formerly belonged to Minamoto no Tametomo ; nomination includes the helmet 1100 late Heian period Ō-yoroi Hiroshima Hatsukaichi Itsukushima Shrine Itsukushima Shrine , Hatsukaichi , Hiroshima
Armour laced with light light green silk braided threads ( 浅黄綾威鎧 , asagi ayaodoshi yoroi ) Nomination includes the helmet 1185 Kamakura period , 12th century Ō-yoroi ; black lacquered iron and leather kozane ( 小札 ) ( small scales laced together ) Hiroshima Hatsukaichi Itsukushima Shrine Itsukushima Shrine , Hatsukaichi , Hiroshima
Armour laced with navy blue threads ( 紺絲威鎧 , konitoodoshi yoroi ) Nomination includes the helmet ; offered by Taira no Shigemori 0794 Heian period Ō-yoroi ; black lacquered iron and leather scales ( 小札 , kozane ) laced together with a thick navy blue thread ; silver plating Hiroshima Hatsukaichi Itsukushima Shrine Itsukushima Shrine , Hatsukaichi , Hiroshima
Black dōmaru armour laced with leather cords ( 黒韋威胴丸 , kuro kawaodoshi dōmaru ) Nomination includes the helmet 0794 Heian period Dō-maru ; black lacquered iron and leather scales ( 小札 , kozane ) laced together with leather cords ( kawaodoshi ) Hiroshima Hatsukaichi Itsukushima Shrine Itsukushima Shrine , Hatsukaichi , Hiroshima
Armour laced with navy blue threads ( 紺絲威鎧 , konitoodoshi yoroi ) Belonged to Kōno Michinobu ( 河野通信 ) ; nomination includes the helmet 0794 Heian period Ō-yoroi ; scales ( 小札 , kozane ) laced together with a thick navy blue thread Ehime Imabari Oyamazumi Shrine Ōyamazumi Shrine , Imabari , Ehime
Armour laced in omodaka ( water plantain ) pattern ( 沢瀉威鎧 , omodaka odoshi yoroi ) Triangular lacing pattern resembling the leaves of the water plantain ; nomination includes the helmet ; oldest ō-yoroi armour 0794 early Heian period Ō-yoroi Ehime Imabari Oyamazumi Shrine Ōyamazumi Shrine , Imabari , Ehime
Armour laced with purple silk braided threads ( 紫綾威鎧 , murasaki ayaodoshi yoroi ) Offered by Minamoto no Yoritomo ; nomination does not include a helmet 1185 Kamakura period Ō-yoroi Ehime Imabari Oyamazumi Shrine Ōyamazumi Shrine , Imabari , Ehime
Gauntlet ( 籠手 , kote ) Formerly in possession of Minamoto no Yoshitsune 1200 Kamakura period , 13th century Pair of gauntlets or armored sleeves ; iron , copper , gold , silk ; length of each : 66.6 cm ( 26.2 in ) Nara Nara Kasuga Taisha Kasuga-taisha , Nara , Nara