however , the policy of europeanization represented by rokumeikan and ' a foreigner judge ' system , which was included in the amendment of the treaty promoted by ito ' s sworn ally kaoru inoue , minister of foreign affairs (japan ), antagonized inside and outside japan , and criticism of the government was mounted rapidly due to the petition of three major affairs by democratic-rights movement , the movement to unite for a common purpose and the resignation of tateki tani , minister of agriculture and commerce , who was thought to be a member of conservative political party (direct rule by the emperor party ) ( [the crisis of the 20th year of the meiji era ]) . だが、伊藤の盟友である井上馨外務大臣 (日本)が進めた条約改正案にあった「外国人裁判官」制度と鹿鳴館に代表される欧化政策が内外の反感を買い、自由民権運動による三大事件建白書や大同団結運動、保守中正派（天皇親政派）と見られた谷干城農商務大臣の辞任を招くなど、政府批判が一気に高まった（「明治20年の危機」）。
since the emperor keitai entered yamato not immediately after the enthronement but the 20th year later after moving from place to place such as kitakawachi or minami-yamashiro , there are two following theories: one that considers due to a power in yamato which didn ' t allow the enthronement of emperor keitai , the region was in the combat situation (theory by kojiro naoki ) and the other that , since keitai , the emperor of the maternal side , was a successor to the throne in the linage of the okinaga clan in omi , which daughters often married those in the great king family , there was no such change of dynasties as usurpation of imperial throne (theory by kunio hirano ). また、即位後もすぐには大和の地にはいらず、北河内や南山城などの地域を転々とし、即位20年目に大和にはいったことから、大和には継体天皇の即位を認めない勢力があって戦闘状態にあったと考える説（直木孝次郎説）や、継体天皇は女系の天皇で、近江の息長氏などは大王家に妃を何度となく入れているが、継体天皇はその大王家の母方といえる息長氏系統の王位継承資格者で、皇位簒奪のような王朝交替はなかったと考える説（平野邦雄説）がある。
