Going further, casting doubt over the common belief that Emperor Tenmu was the younger brother of Emperor Tenchi, there is a different view that says they were not brothers. (Katsuaki SASSA etc.)
さらに進めて、天武天皇が天智天皇の弟だったという通説に疑問を呈し、兄弟ではなかったのではないかという異説も存在する（佐々克明ら）。