Tropical Storm Peipah (2025)

Tropical Storm Peipah, known in the Philippines as Tropical Depression Kiko, was a weak tropical storm that affected Japan in early September 2025. The fifteenth named storm of the 2025 Pacific typhoon season, Peipah originated as a low-pressure area near Palau on August 30. Situated in the Philippine Area of Responsibility (PAR), the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) classified the system as a tropical depression on September 2 and gave it the local name Kiko. Two days later, the Japan Meteorological Agency (JMA) upgraded it to a tropical storm, assigning it the international name Peipah. Tracking northward, the storm passed near the Ryukyu Islands before curving eastward and brushing the southern coast of western Japan on September 4. Peipah made landfall over Sukumo, Kōchi Prefecture, Japan, at around 01:00 JST (16:00 UTC) on the following day, and later that morning, at 09:00 JST, struck northern Wakayama Prefecture as it moved across the Kii Peninsula. The system then began extratropical transition while accelerating east-northeastward along the northern edge of the subtropical ridge. Both the JMA and the Joint Typhoon Warning Center (JTWC) issued their final advisories later that day as Peipah became an extratropical low. AON estimates that losses totaled to US$150 million.