Japan: Pollen Season Peaks as Rising Temperatures Spread Heavy Dispersal Nationwide 2

Heavy pollen dispersal was reported across a wide area of Japan from Kyushu to Tohoku on Saturday, April 4, as rising temperatures following rainfall created ideal conditions for pollen to spread. Cedar pollen remained predominant in the Tohoku and Hokuriku regions, while cypress pollen was the main concern from Kyushu to Kanto.

Japan: Pollen Season Peaks as Rising Temperatures Spread Heavy Dispersal Nationwide

Heavy pollen dispersal was reported across a wide area of Japan from Kyushu to Tohoku on Saturday, April 4, as rising temperatures following rainfall created ideal conditions for pollen to spread. Cedar pollen remained predominant in the Tohoku and Hokuriku regions, while cypress pollen was the main concern from Kyushu to Kanto.

Japan: Cedar Pollen Reaches Its Peak With Heavy Dispersal Reported 3

Cedar pollen levels reached their peak across a wide area of Japan, including Tokyo, on Saturday, February 28, as strong winds and rising temperatures created ideal conditions for mass dispersal. In several regions, a "pollen corona" was observed around the sun, a visual phenomenon indicating an extreme concentration of pollen in the atmosphere.

Japan: Cedar Pollen Reaches Its Peak With Heavy Dispersal Reported 5

Cedar pollen levels reached their peak across a wide area of Japan, including Tokyo, on Saturday, February 28, as strong winds and rising temperatures created ideal conditions for mass dispersal. In several regions, a "pollen corona" was observed around the sun, a visual phenomenon indicating an extreme concentration of pollen in the atmosphere.

Japan: Cedar Pollen Reaches Its Peak With Heavy Dispersal Reported 4

Cedar pollen levels reached their peak across a wide area of Japan, including Tokyo, on Saturday, February 28, as strong winds and rising temperatures created ideal conditions for mass dispersal. In several regions, a "pollen corona" was observed around the sun, a visual phenomenon indicating an extreme concentration of pollen in the atmosphere.

Japan: Cedar Pollen Reaches Its Peak With Heavy Dispersal Reported

Cedar pollen levels reached their peak across a wide area of Japan, including Tokyo, on Saturday, February 28, as strong winds and rising temperatures created ideal conditions for mass dispersal. In several regions, a "pollen corona" was observed around the sun, a visual phenomenon indicating an extreme concentration of pollen in the atmosphere.

Japan: Cedar Pollen Reaches Its Peak With Heavy Dispersal Reported 2

Cedar pollen levels reached their peak across a wide area of Japan, including Tokyo, on Saturday, February 28, as strong winds and rising temperatures created ideal conditions for mass dispersal. In several regions, a "pollen corona" was observed around the sun, a visual phenomenon indicating an extreme concentration of pollen in the atmosphere.

Japan: Hay Fever Alert Issued as Mass Pollen Dispersal Expected to Peak Nationwide

As of February 16, the start of cedar pollen dispersal has been confirmed in parts of the region stretching from Kyushu to Tokai. By late February, dispersal is expected to begin across a wide area ranging from Kyushu to southern Tohoku. In Shizuoka Prefecture specifically, cedar pollen began dispersing in early February 2026; total volume is expected to reach 1.9 times the average of the past 10 years. Thick pollen is visible in the video, creating hazy conditions across the mountain range.