Photo/Illutration Pedestrians pass through a crossing amid rain in Tokyo’s Shinjuku Ward on Oct. 25. (Takuya Tanabe)

Torrential rains have struck areas ravaged by a typhoon earlier this month, with flooding in hard-hit Chiba Prefecture prompting many people to evacuate, and leaving at least one person dead.

The Japan Meteorological Agency warned of swelling rivers, possible embankment damage and landslides due to torrential rain expected Oct. 25-26 in both eastern and northern Japan.

A low-pressure system is likely to bring the largest amount of rainfall since Typhoon No. 19 struck the archipelago on Oct. 12, causing extensive flooding in multiple prefectures.

The Kamogawa municipal government in Chiba Prefecture issued evacuation orders to 452 households comprising 926 people on Oct. 25 due to flooding observed in the Kamogawa and Yorogawa rivers.

The orders are categorized as a Level 4 out of five on the emergency scale for flooding and landslides, meaning that residents of the affected areas should evacuate immediately.

Around 1:15 p.m. on Oct. 25 in the Hondacho district in Chiba city's Midori Ward, a resident reported that two residences had been knocked down by a landslide. According to prefectural police, one woman was sent to a hospital where she was pronounced dead.

As two women in their 40s and 60s who live in the homes could not be reached by phone, one of them is presumed to be the victim.

Around 1:35 p.m. in the Itakuracho district of the ward, at least one house was hit by a landslide. A man in his 60s believed to be the resident was unreachable by phone.

About 160 millimeters of rain fell in the Kamogawa district over three hours on the day, with 139.5 mm reported in Ichihara's Ushiku district, both record figures, according to the JMA's Choshi Local Meteorological Office.

Waters of the Yorogawa river in Ichihara had risen above embankments as of 3 p.m., flooding nearby areas. The Ichihara municipal government issued the highest-level warning for 893 people in 399 households in response, urging them to take measures to protect their lives.

The Ichinomiyagawa and Kamogawa rivers have risen to dangerous levels, and 43 municipalities in the prefecture have been warned of possible landslides, according to the prefectural government.

As of 1 p.m., five cities including Ichihara, Sakura and Mobara issued evacuation orders, while 21 municipalities issued advisories. A total of 120 sites in 19 municipalities are serving as shelters.

The JMA said it expects rain exceeding 50 mm per hour through the evening of Oct. 25 for the Kanto and Koshin regions, followed by the Tohoku region before noon the next day.

A total of 180 mm of rain is expected during the 24 hours until 6 a.m. the next day in Kanto and Tohoku, with 150 mm expected in the Koshin and Tokai regions and the Izu island chain.

The JMA also urged caution against high waves due to violent winds in coastal areas of the Kanto region through the late evening of Oct. 25 and in Tohoku until about noon the next day, as Typhoon No. 21 churns north toward eastern Hokkaido.