「磐井の乱」は，527年（530年とする説もある）に勃発した倭王権（継体大王）と北部九州（筑紫君磐井）との抗争である。長年の研究によって，当時の東アジア情勢，特に日朝関係の動向が「乱」の勃発に深く関係していることが明らかにされている。したがって，5，6世紀における中・北部九州地域の対朝鮮半島交渉の様態を考古学的に検討し，その内容と古代史の研究成果を総合化することによって，より豊かに「磐井の乱」の歴史的意義にせまることが可能と考える。考古学的な検討の結果，主に5世紀代には，中・北部九州地域の対朝鮮半島交渉には，大きく2つの様態を想定できた。すなわち，倭王権主導の外交に積極的に参与しつつその意図のもとで活動するような様態と，対外活動に長けた人物を傘下に置き，独自的な対朝鮮半島交渉を重ねる様態である。また，5世紀後半には，玄界灘沿岸地域と有明海・八代海沿岸地域では，倭王権との関係に微妙な差異が認められた。後者は，倭王権とより直接的な関係を結びつつ，他の諸地域社会と「野合」するような形での交渉を行っていたようである。相対的に百済や大加耶とのつながりが深い。その一方で，前者は主体的な交渉の比重が高く，新羅とのつながりがより緊密である状況が明らかとなった。そして，6世紀前半には，大加耶系の垂飾付耳飾が玄界灘沿岸地域に突如として広まるなど，交渉の様態に変化が認められた。その背景に，中・北部九州地域の首長層が，主に倭王権の意図に沿うような形で対朝鮮半島交渉活動を行う動きを読みとった。以上のような考古学的な検討と，古代史によって明らかにされた「磐井の乱」の動向や背景を総合化すると，かなりの整合性を見出しえる。したがって，「乱」勃発の要因のひとつには，主体的な対朝鮮半島交渉をくりひろげる中・北部九州地域と対外交渉権の一元化を志向する倭王権の確執があったことが想定できる。

The “Iwai Rebellion” is a conflict between Yamato (King Keitai) and Northern Kyushu (Tsukushi-no-Kimi-Iwai) that broke out in AD 527 (some say it was AD 531). Many years of research have revealed that the situation in East Asia at that time, especially the trends in Japan-Korea relationships, is deeply related to the outbreak of “rebellion”. Therefore, archaeological investigation on negotiations with the Korean Peninsula in the central and northern Kyushu regions in the 5-6th centuries and integration with research results of ancient history will richly clarify the historical significance of the “Iwai Rebellion”.As a result of archaeological studies, mainly in the 5th century, two major modes could be envisioned for negotiations with the Korean Peninsula in the central and northern Kyushu regions. In other words, it is a mode in which it actively participated in diplomacy led by the Wa kingship and acts with its intention, and a mode in which a person who is good at foreign activities was placed under the umbrella to handle continued negotiations with the Korean Peninsula.Also, in the latter half of the 5th century, a subtle difference was observed in the relationship between the Genkai Sea coastal area and the Ariake Sea coastal area to the Wa kingship. The latter seems to have been negotiating in an unprincipled manner with the other regional communities while having a more direct relationship with the Wa kingship as well as a relatively deep connection with Baekje and Gaya. On the other hand, it became clear that the former had a high weight of independent negotiations and a closer connection with Silla.Then, in the former half of the 6th century, changes were observed in the form of negotiations, such as the sudden spread of earrings with hanging decorations from the Daegaya to the coast of the Genkainada sea area. It is interpreted that the chiefs of the central and northern Kyushu regions became to negotiate with the Korean Peninsula mainly in line with the intention of the Wa kingship.By combining the above archaeological studies with the trends and background of the “Iwai Rebellion” which was revealed in ancient history, a considerable degree of consistency can be found. Therefore, it can be assumed that one of the factors behind the outbreak of the “rebellion” was the feud between the central and northern Kyushu regions, which are engaged in proactive negotiations with the Korean Peninsula, and the Wa kingship, which aims to unify the right to foreign negotiations.

source:https://www.rekihaku.ac.jp/outline/publication/ronbun/ronbun10/index.html#no231