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Kenkyū ( was a 建久) Japanese era name ( after 年号 , "year name") nengō and before Bunji This period spanned the years from April 1190 through April 1199. Shōji. The reigning emperor was  Go-Toba -tennō (. 後鳥羽天皇)
Change of era
1190 Kenkyū gannen (: The new era name was created to mark an event or a number of events. The previous era ended and a new one commenced in 建久元年) Bunji 6, on the 14th day of the 8th month of 1185. 
Events of the Kenkyū era
1192 ( Kenkyū 3, 13th day of the 3rd month): The former- Emperor Go-Shirakawa died at the age of 66. He had been father or grandfather to five emperors --  Emperor Nijō, the 78th emperor; Emperor Rokujō, the 79th emperor; Emperor Takakura, the 80th emperor; Emperor Antoku, the 81st emperor; and Go-Toba, the 82nd emperor. 
1192 ( Kenkyū 3, 12th day of the 7th month): Minamoto no Yoritomo is named commander-in-chief of the forces to fight the barbarians. 
1195 ( Kenkyū 6, 4th day of the 3rd month): Shōgun Yoritomo revisits the capital. 
1198 ( Kenkyū 9, 11th day of the 1st month): In the 15th year of Go-Toba -tennō 's reign (後鳥天皇15年), the emperor abdicated; and the succession ( senso) was received by his eldest son. 
1198 ( Kenkyū 9, 3rd month): Emperor Tsuchimikado is said to have acceded to the throne ( sokui).  1199 ( Kenkyū 10, 13th day of the 1st month): Shōgun Yoritomo dies at age 53 in Kamakura. 
, a text on literary criticism also known as Mumyōzōshi Kenkyū Monogatari
^ Nussbaum, Louis-Frédéric. (2005). "
Kenkyū" in n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, Japan encyclopedia, p. 509; see Deutsche Nationalbibliothek Authority File Archived 2012-05-24 at Archive.today.
^ Titsingh, Isaac. (1834).
Annales des empereurs du Japon, pp. 207–221; Brown, Delmer et al. (1979). Gukanshō, pp. 334–339; Varley, H. Paul. (1980). Jinnō Shōtōki. pp. 215–220.
^ a b Brown, p. 337.
^ Varley, p. 208; Kitagawa
et al. (1975). The Tale of the Heike, p. 788.
^ a b c Kitagawa p. 788.
^ Brown, p.339; Varley, p. 44; a distinct act of
senso is unrecognized prior to Emperor Tenji; and all sovereigns except Jitō, Yōzei, Go-Toba, and Fushimi have senso and sokui in the same year until the reign of Emperor Go-Murakami.
^ Titsingh, p.221; Varley, p. 44.