A weather front moving from the west will bring rain to western Japan on Tuesday, May 26 [1, 2].
The shifting weather pattern poses a significant risk to residents in the Amami region, where meteorologists said that line-shaped rain bands could trigger heavy rainfall and landslides [1, 2].
According to TBS NEWS DIG, rain is expected to begin in Kyushu on Tuesday morning [1]. While some reports from livedoor news suggest rain in southern Kyushu may not start until the evening, the general trend indicates a deteriorating weather situation for the region [1, 2]. The rain is projected to spread to the Shikoku and Chugoku regions starting from the afternoon and evening [1, 2].
This instability is caused by high pressure moving east, which allows moist air to flow into the area as a front and low-pressure system approach from the west [1, 2]. In contrast, eastern and northern Japan are expected to remain mostly sunny [1, 2].
Temperature forecasts for Tuesday show a wide range across the archipelago. In the north, Kushiro is expected to reach a maximum of 13 °C [1], while Sapporo and Sendai are both forecast at 24 °C [1]. Aomori is expected to reach 20 °C [1], and Morioka is forecast at 25 °C [1].
Central and eastern regions will see warmer conditions. Niigata is forecast at 26 °C [1], while Nagano and Kanazawa are both expected to hit 28 °C [1]. Nagoya and Tokyo are both projected to reach 27 °C [1].
In the west, temperatures remain high despite the approaching rain. Osaka and Matsue are both forecast to reach 31 °C [1]. Okayama is expected to hit 29 °C [1], and Hiroshima is forecast at 28 °C [1]. Kochi is projected to reach 27 °C [1].
“Line-shaped rain bands could trigger heavy rainfall and landslides.”
The potential for line-shaped rain bands in the Amami region represents a high-impact weather event that often leads to localized flooding and geological instability. Because the system is moving from west to east, the timing of the precipitation is critical for emergency preparations in Kyushu, Shikoku, and Chugoku, while the stark temperature contrast between Kushiro and Osaka highlights the varied climatic conditions currently affecting the Japanese archipelago.
