In shogi, Buoyant Rook (浮き浮き飛車 or ウキウキ飛車 ukiukibisha) or the Deceiver (目くらまし me kuramashi or 浮き飛車目くらまし ukibisha me kuramashi) is a surprise Static Rook opening in which the player's rook is advanced to the file directly above their line of pawns (rank 6 for Black or rank 4 for White) behind an advanced rook pawn.
[1] Once positioned on this rank, the player threatens to capture with their rook any pawns that are advanced by their opponent.
The term float (浮く uku) is used to refer to the positioning of the rook on rank 6 or 4 where it is undefended.
The word 浮き浮き ukiuki means light-hearted or cheery as if metaphorically floating.
This move will also allow White to develop a Ranging Rook position.