Japan faces renewed heavy rain from Friday, June 5, through Monday, June 8, 2024, as a tropical depression and rainy-season front move across the region [1].

This weather pattern is critical because it follows record-breaking June rains caused by Typhoon No. 6. With the ground already saturated, officials said that additional precipitation significantly increases the risk of further landslides across the archipelago [1].

The forecast extends from Okinawa in the south through western and eastern Japan, including major urban centers such as Tokyo, Osaka, Hiroshima, and Sendai [1]. A TBS NEWS DIG weather reporter said that rain is expected to begin falling again in the Pacific side of Shikoku and southern Kyushu, areas that recently experienced heavy rainfall [1].

Meteorologists attribute the current instability to the combined influence of a newly formed tropical depression, a stationary rainy-season front, and lingering moisture from the previous typhoon [1], [2]. The tropical depression formed near the Mariana Islands, where sea-surface temperatures have reached 30 °C [2]. The Japan Meteorological Agency said that while it is not yet certain if the system will develop into a typhoon, the high sea-surface temperatures provide the potential for such development [2].

Daily forecasts for Friday include a high of 22 °C in Tokyo and 26 °C in Osaka [1]. Residents in the affected regions are urged to remain vigilant regarding soil stability and flash flooding as the system progresses through the weekend [1].

“Japan faces renewed heavy rain from Friday, June 5, through Monday, June 8, 2024.”

The convergence of a tropical depression and a stationary front creates a compounding disaster risk. Because Typhoon No. 6 already delivered record rainfall, the geological threshold for landslides has been lowered, meaning even moderate additional rain could trigger catastrophic slope failures in vulnerable regions.