KWS (Kyoto/Kiso Wide-field Survey) has detected an outburst of VZ Sextantis = 1RXS J094432.1+035738. object date(UT) mag. code err. SEXVZ 20121211.83359 12.844V KW2 0.216 SEXVZ 20121211.84574 12.918V KW2 0.239 KW2: Kyoto/Kiso Wide-field Survey f=105mm lens (F/2.0) + SBIG ST-8XME