JMA identifies Koguma as typhoon 2629, with data identifier TC2634. This page follows that specific 2026 system and links its official track; use the source and analysis times below when comparing updates.
Koguma 2026: name, number and agency
The JMA list and matching forecast product reviewed on 12 October 2026 identify Koguma as 2629 and TC2634. These identifiers keep the record separate from similarly named storms and products issued by other agencies. The panel checks both the identifier and name before displaying this system’s analysis.
What the 12 October forecast showed
The JMA product issued at 12:45 UTC on 12 October placed the analyzed center at 31.4°N, 148.5°E at 12:00 UTC. Its subsequent forecast points moved northeastward over the open Pacific. This dated forecast is not a report of a Japanese landfall. Open the current JMA map for later revisions and their valid times.
Analysis time and forecast time are different
An analysis position describes the center at the stated analysis time. A forecast position describes a later valid time; it must not replace the analyzed position in a “current location” label. The publication time can be later than the analysis time. This tracker shows both so comparisons do not mix different stages of the forecast.
Reading the JMA forecast circle
JMA’s forecast circle represents uncertainty about the center’s future position. Its stated center-position probability is 70%; the circle does not show the physical size of the typhoon. The line connecting predicted centers should be read together with the circles and their times. Consult the official chart guide linked below when interpreting the display.
Koguma and Japan: where to check local effects
Use the Japan guide to reach JMA’s forecast and warning products for the relevant locality. A distant center position alone cannot establish conditions for a coast, island or travel route. For a specific place, read the current local product’s hazard, coverage and validity period, alongside the cyclone track. This page does not assign a landfall date or local warning.
What this tracker updates and how to share it
The panel checks JMA every five minutes while open. Its selected track product supplies position and times; unavailable wind or pressure fields remain blank. If Koguma leaves the current list or a request fails, current figures are cleared and official links remain. Share the page with 2026, 2629 and the source time; the page does not send warning notifications.
Official references
Reviewed 2026-10-12. Independent guide; follow NHC and local authorities for safety decisions.