JPY 1704 pre-market surge for 4100.T Toda Kogyo (JPX) 21 Jan 2026: volume 245,400 flags earnings interest

4100.T stock jumps 23.39% in pre-market trading on JPX to JPY 1704.00 on 21 Jan 2026, as volume hits 245,400 shares versus a 50,571 average. This high-volume mover shows a relative volume of 3.53x, signalling strong trader interest ahead of an earnings date on 9 Feb 2026. We view the move as short-covering and momentum chasing with mixed fundamental signals. Traders should watch liquidity and near-term catalysts closely.