Typhoon Nanmadol moved away from Japan after bringing high winds and heavy rainfall over the last few days of 18-20 September.
Fortunately its wind speeds lessened considerably as it made landfall and the typhoon was in the main an equivalent of a category 2. Substantial rainfall causing flooding and landslides were the main consequences rather than material wind damage. Power blackouts caused the suspension of train and plane services.
Tokyo was one of the regions affected by the rainfall. Kyushu island and parts of Honshu had 10-15 inches of rain apparently.
Insured loss estimates are not yet available from any catastrophe modeller. Although Nanmadol may turn out to be the third-strongest typhoon since records began, the re-underwriting of Japanese wind and flood exposures since typhoons Hagibis, Faxai and Jebi, should have helped reinsurers escape a significant loss from Nanmadol. Rainfall/flooding is covered so we await considered estimates from the catastrophe modellers.
Update 30 Sept
Reports are circulating that Nanmadol could be around US$6bn so less than Jebi (2018) and less than the combined total of Faxai and Hagibis (2019).