Genevieve crossed the International Date Line at 06:00 UTC on August 7, entering the area of responsibility of the RSMC Tokyo operated by the Japan Meteorological Agency (JMA). The JMA recognized Genevieve as a typhoon with ten-minute maximum sustained winds at 115 mph (185 km/h). The Joint Typhoon Warning Center (JTWC) also upgraded Genevieve to a super typhoon. Only six hours later, the JTWC reported that Genevieve had reached Category 5 status with one-minute sustained winds at 160 mph (260 km/h), with a microwave imagery revealing a diameter eyewall with a convective band over the south quadrant. As Genevieve continued to remain in a favorable environment with radial outflow and low vertical wind shear, the JMA indicated that the typhoon about 760 mi (1220 km) east-southeast of Wake Island had reached its peak intensity late on August 7, with ten-minute maximum sustained winds at 125 mph (205 km/h).