Extractability out of a null clausal complement has recently been investigated intensively to assess whether a null argument, NP/DP or clause, has internal syntactic structure in such languages as Korean and Japanese. As a starting point, I critically review Takahashi’s (2020; 2023) and Park’s (2023) recent study of this issue in cleft constructions. In addition to them, I also discuss the two more constructions involving right dislocation and relativization, showing that apparent extraction out of a null clausal complement in all of the constructions involve alleged chain heads at the (not left but) right periphery of the clauses that they are interpretively associated with. I move on to show using several diagnostics that the constructions at issue do not involve leftward movement, arguing against Takahashi’s (2020; 2023) and Park’s (2023) advocation of the extraction out of a null clausal complement inside these constructions. All in all, the extraction out of a null clausal complement is not allowed in Korean and Japanese. (Dongguk University)