# Sai of Wa

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Genealogy of the Five kings of Wa and Emperors :
| Book of Song | Book of Liang |
| San of Wa (421, 425 ce)Chin of Wa (438 ce) Sai of Wa (443, 451 ce) Ko of Wa (462 ce)Bu of Wa (478 ce) | San of WaChin of Wa Sai of Wa Ko of WaBu of Wa |
| Genealogy of Emperors in Nihon Shoki (Numbers in parentheses are Japanese epithets) ||
| $^{15}$ Ojin (誉田別) $^{16}$ Nintoku (大鷦鷯) $^{17}$ Richū (去来穂別)$^{18}$ Hanzei (瑞歯別)$^{19}$ Ingyō (雄朝津間稚子宿禰) Ichinobe no OshiwaKinshari$^{20}$ Ankō (穴穂)$^{21}$ Yūryaku (大泊瀬幼武) ||
Sai of Wa (済) was a king of Wa in the middle of the 5th century (Kofun era). He was also known as Wa Osai.
Father of Ko and Wu, he was one of the Wa. He is considered to be the 19th Emperor Ingyo.

## Records
### Book of Liang
#### The Biography of Liang

    In the Book of Liang, the article on "Yamato" (梁書倭伝) states that his son Je stood up after the death of "Ya", and his son Xing stood up after his death.。

### History of the Southern Dynasties

In the History of the Southern Dynasties, the article on the Japanese Kingdom (Nan shi wagu den) describes the contents of the Song Shu Chronicles.
vte :
| Year | Goguryeo | Baekje | Wa |
| 317 | Eastern Jin | Eastern Jin | Eastern Jin |
| 372 | | Geunchogo of Baekje | |
| 386 | | Jinsa of Baekje | |
| 413 | Jangsu of Goguryeo | | |
| 416 | Jangsu of Goguryeo | Jeonji of Baekje | |
| 420 | Liu Song dynasty | Liu Song dynasty | Liu Song dynasty |
| 420 | | Jeonji of Baekje | |
| 421 | | | San of Wa |
| 438 | | | Chin of Wa |
| 443 | | | Sai of Wa |
| 451 | | | Sai of Wa |
| 457 | | Gaero of Baekje | |
| 462 | | | Ko of Wa |
| 463 | Jangsu of Goguryeo | | |
| 478 | | | Bu of Wa |
| 479 | Southern Qi | Southern Qi | Southern Qi |
| 479 | | | Bu of Wa |
| 480 | Jangsu of Goguryeo | Moudu | |
| 490 | | Dongseong of Baekje | |
| 494 | Munjamyeong of Goguryeo | | |
| 502 | Liang dynasty | Liang dynasty | Liang dynasty |
| 502 | Munjamyeong of Goguryeo | Dongseong of Baekje | Bu of Wa |

## Historical investigation
### On the continuity between Je and Chin

In the article in the Sung Shu, Je takes the surname "Wa" (倭) as did the previous Japanese king Jin, but does not clarify his relationship to Jin. Since they do not name the continuation, there is a theory that Je and Chin were not close blood relatives, and since the Nihon Shoki shows a struggle in the succession to the throne after Emperor Nintoku, the possibility of the existence of such a struggle over the throne is pointed out In addition, since the Wazui [ja] can be seen as a particularly powerful royal family in the Chin period, there is a theory that there were two royal forces at that time (Mozu Kofun Cluster and Furuichi Kofun Cluster), and that Je may have been a lineage of this Wazui。

### Comparison of the tombs

During the period of activity of the Five kings of Wa, the tombs of the great kings were constructed in the Mozu Tombs and Furuichi Kofun Cluster (Osaka Prefecture, Sakai City, Habikino City, Fujiidera), and Je's tomb is assumed to be one of them. These tombs are now designated as mausoleums by the Miyouchi Agency, so there is a lack of archaeological data to date them, but one theory compares them to the Ichinoyama Kofun (the current imperial tomb of Emperor Ingyo).
Another archaeological source is the "Gift of Wang" excavated from the Inaridai Kofun Group (Ichihara City, Chiba Prefecture). (or Chin), since he is self-explanatory only by writing "Wang". It should be noted, however, that the iron sword from Inariyama burial mound inscription and the iron sword from Etafuneyama burial mound [ja] inscription are distinct from the "Great King" of the Inariyama Sword。