Although according to a well known theory, the Emperor Tenmu and Aya no kimi, who was the son of the Empress Kogyoku and her former husband Takamukuo, was actually the same person (therefore the Emperor Tenmu was the older maternal half-brother of the Emperor Tenchi); there are no contradictions within the historical materials (The details are as follows.)
特に母の皇極天皇が舒明天皇の前に結婚していた高向王との間に生まれた漢王と同一人物（つまり、天武異父兄説）ではないかとする考えが有名であるが、同一史料には矛盾は見られない（詳しくは下記参照）。