Recent unofficial reports point to the LS F as a potential candidate.

Lexus has issued a vague promise to reveal a concept car at the Tokyo Motor Show.

The announcement does not identify the mystery model, with nary a single darkened tight-zoom teaser image to help drum up excitement and narrow the list of possibilities.

The luxury marque will focus on its all-new LS flagship sedan at the show. A recently surfaced image suggests the concept could reinforce the central theme, potentially previewing the high-performance LS F edition.

Presumed to show the LS F, the alleged leaked photo points to a restyled front end with exaggerated air intakes, a blacked-out color theme and 20-inch dark wheels. The F Sport variant is also expected to benefit from larger brakes, variable ratio steering, active stabilizers and rear steering, among other enhancements.

The automaker also recently shed light on its electrification strategy, confirming plans to offer pure battery-powered EVs and fuel-cell vehicles. Such models are not expected until 2020 or later, but Lexus could join other automakers in revealing a far-off visionary concept to demonstrate its zero-emissions commitment.