Japan: Emperors: 593-984 - Archontology
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Japan: Emperors: 593-984

Each ruler is recorded under the following protocol: posthumous name || personal name; the other entries follow the definitions in the Notes.
Tennō (from ca. 672)
15 Jan 593 - 15 Apr 628 Suiko-tennō || Nukadabe
old posthumous name: Toyo-mike-kashiki-ya-hime-no-sumera-mikoto
 
2 Feb 629 - 17 Nov 641 Jomei-tennō || Tamura
old posthumous name: Okinaga-tarashi-hi-hiro-nuka-no-sumera-mikoto
 
19 Feb 642 - 12 Jul 645 Kōgyoku-tennō || Takara
old posthumous name: Ame-toyo-takura-ikashi-hi-tarashi-hime-no-sumera-mikoto
 
12 Jul 645 - 24 Nov 654 Kōtoku-tennō || Karu
old posthumous name: Ame-yorozu-toyo-hi-no-sumera-mikoto
 
14 Feb 655 - 24 Aug 661 Saimei-tennō (alternative reading: Saimyō-tennō) || Takara 
old posthumous name: Ame-toyo-takura-ikashi-hi-tarashi-hime-no-sumera-mikoto
 
24 Aug 661 - 7 Jan 672 Tenji-tennō || Katsuragi Naka-no-ōe [1]
old posthumous name: Ame-mikoto-hirakasu-wake-no-sumera-mikoto
 
9 Jan 672 - 21 Aug 672 Kōbun-tennō || Ōtomo Iga
 
20 Mar 673 - 1 Oct 686 Tenmu-tennō || Ō-ama
old posthumous name: Ame-no-nunahara-oki-no-mabito-no-sumera-mikoto
 
1 Oct 686 - 22 Aug 697 Jitō-tennō || Uno-no-sarara [2]
old posthumous name: Takama-no-hara-hiro-no-hime-no-sumera-mikoto
 
22 (or 23) Aug 697 - 18 Jul 707 Monmu-tennō || Karu
old posthumous name: Ama-no-mamune-toyo-ōji-no-sumera-mikoto
 
27 Jul 707 - 3 Oct 715 Genmei-tennō (alternative reading: Genmyō-tennō) || Abe
old posthumous name: Yamato-neko-amatsu-mi-shiro-toyo-kuni-nari-hime-no-sumera-mikoto
 
3 Oct 715 - 3 Mar 724 Genshō-tennō || Hitaka Nii-no-mi
old posthumous name: Yamato-neko-taka-mizu-kiyo-tarashi-hime-no-sumera-mikoto
 
3 Mar 724 - 19 Aug 749 Shōmu-tennō || Ōbito (Buddhist name in retirement: Shōman)
old posthumous name: Ame-shirushi-kuni-oshi-haruki-toyo-asakura-hiko-no-sumera-mikoto
 
19 Aug 749 - 7 Sep 758 Kōken-tennō || Abe
old posthumous name: Taka-no-hime-no-sumera-mikoto
by-name between reigns: 7 Sep 758 - 6 Nov 764 Takano-tennō
 
7 Sep 758 - 6 Nov 764 Junnin-tennö || Ō-i
posthumous by-name: Awaji-no-haitei
   
6 Nov 764 - 28 Aug 770 Shōtoku-tennō || Abe  (Buddhist name in retirement: Hokini)
old posthumous name: Taka-no-hime-no-sumera-mikoto
 
28 Aug 770 - 30 Apr 781 Kōnin-tennō || Shirakabe
old posthumous name: Ame-mune-taka-tsugi-no-sumera-mikoto
 
30 Apr 781 - 9 Apr 806 Kanmu-tennō || Yamabe
old posthumous name: Yamato-neko-amatsu-hitsugi-iyaderi-no-sumera-mikoto
posthumous by-name: Kashiwabara-haitei
   
9 Apr 806 - 18 May 809 Heizei-tennō (alternative reading: Heijō-tennō) || Ate
old posthumous name: Yamato-neko-ame-oshi-kuni-take-hiko-no-sumera-mikoto
posthumous by-name: Nara-tei
   
18 May 809 - 29 May 823 Saga-tennō || Kamino
 
29 May 823 - 22 Mar 833 Junna-tennō || Ōtomo
old posthumous name: Yamato-neko-ame-takayuzuru-iyatō-no-sumera-mikoto
posthumous by-name: Sai-in-tennō
   
22 Mar 833 - 6 May 850 Ninmyō-tennō || Masara (alternative reading: Masayoshi)
old posthumous name: Yamato-neko-ame-shirushi-toyo-sato-no-sumera-mikoto
posthumous by-name: Fukakusa-tei
   
6 May 850 - 7 Oct 858 Montoku-tennō || Michiyasu
posthumous by-name: Tamura-tei
   
7 Oct 858 - 18 Dec 876 Seiwa-tennō || Korehito (Buddhist name after retirment: Soshin)
posthumous by-name: Mino-o-tei
   
18 Dec 876 - 4 Mar 884 Yōzei-tennō || Sadaakira
posthumous by-name: Nijō-in
   
4 (or 5) Mar 884 - 17 Sep 887 Kōkō-tennō || Tokiyasu
posthumous by-name: Komatsu-tei
   
17 Sep 887 - 4 Aug 897 Uda-tennō || Sadami (alternative reading: Sadayoshi; Buddhist name after retirement: Kongō-kaku)
posthumous by-name: Chōji-in-tei
   
4 Aug 897 - 16 Oct 930 Daigo-tennō || Atsugimi (alternative reading: Atsuhito; Buddhist name after retirement: Hō-kongō)
posthumous by-name: Ono-tei
   
16 Oct 930 - 23 May 946 Suzaku-tennō (alternative reading: Shujaku-tennō) || Yutaakira (alternative reading: Hiraakira)
 
23 May 946 - 5 Jul 967 Murakami-tennō || Nariakira (Buddhist name after retirment: Hō-kongō)
 
5 Jul 967 - 27 Sep 969 Reizei-tennō || Norihira
posthumous by-name: Reizei-in Jōkō
   
27 Sep 969 - 24 Sep 984 En'yū-tennō || Morihira (Buddhiast name after retirement: Kongō Hō)
 

[1] Governed 24 Aug 661 - 20 Feb 668 as Kōtaishi ("prince imperial") before installation.
[2] 1 Oct 686 - 18 May 688 nominally governed for Kusakabe-ōji (died before proclamation; posthumous name: Okanomiyagou-tennō) and was installed only 14 Feb 690.