Grass Pollen Count in Hachiōji, Japan

Last updated Friday, November 6, 2026

This page shows the most recent reading available for Hachiōji — from Friday, November 6, 2026 (1 day ago) — not today's reading.

Pollen by type in Hachiōji

What is the grass pollen count in Hachiōji today?

The Hachiōji grass pollen index today is 1 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Hachiōji’s overall pollen count today is 25 (Low) across all types. See the full Hachiōji pollen count for the overall index and every type together.

Hachiōji is in Hachiōji Shi, Tokyo, Japan. Its population is 579,355 (GeoNames).

Hachiōji Grass Pollen Count: 5-Day Forecast

DayOverall indexCategory
Friday, November 625Low
Saturday, November 710Low
Sunday, November 825Low
Monday, November 923Low
Tuesday, November 1023Low

Pollen Atlas models the daily detail as an overall index: day-by-day splits by individual pollen type are not part of the modelled data, so this table shows Hachiōji’s overall trend across the week. Today’s grass pollen reading is the headline above.

Species driving Hachiōji’s grass pollen

The modelled data reports grass as one combined index — there is no species-by-species split for grass anywhere in the data, so this page does not invent one. Today’s modelled grass index for Hachiōji is 1 (Low), and the 5-day overall trend above shows the shape of the week.

As regional context only — not as today’s readings — in the Global pattern, the plants that shape this city’s year vary with its local climate and vegetation, and no single regional calendar is published for this area.

Plants affecting Hachiōji now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Hachiōji. The type summary stands: grass pollen reads 1 (Low) today.

In the Global pattern, the plants that shape this city’s year vary with its local climate and vegetation, and no single regional calendar is published for this area — named here as regional context only, not as today’s readings.

Plant detail returns here automatically on any day the feed includes it.

What this grass pollen level means

Low risk. Keep windows open; consider allergy meds only if sensitive.

Enjoy outdoor activities.

Grass pollen seasons vary with local climate and vegetation, and the measured value outranks any general seasonal expectation. No regional calendar is asserted for this area, so today’s grass pollen reading is reported as a modelled index value, without placing this month inside or outside a regional window. No Japan allergy season guide is published yet, so the seasonal context here follows the Global regional pattern.

Hachiōji allergies today

Hachiōji allergies today are set by the same reading as the Hachiōji pollen count today: the Total Pollen Index is 25 (Low), and the grass pollen index on this page is 1 (Low) of it. When people ask about Hachiōji allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Hachiōji.

Allergies in Hachiōji follow the Japan calendar set out on the full Hachiōji page — the chapters, the plants behind them, and the 5-day forecast show whether today is typical for the season or an exception to it. If you are checking allergies today in Hachiōji before heading outdoors, the grass pollen split on this page is the part to read: it shows whether this pollen type is doing the work today, not just how high the total sits.

Read the five-day overall trend above as the Hachiōji allergy forecast for the grass pollen season: it shows whether Hachiōji allergies are set to ease or build across the week, day by day — the days to plan outdoor time around are the ones where the overall index steps down, not just today.

See the full Hachiōji pollen count — all types, the overall index and today’s ranking context

Hachiōji tree pollen count

Hachiōji ragweed pollen count

See how Hachiōji ranks in today's pollen count rankings — the worst cities for allergies today

See Hachiōji on the pollen map

Every pollen type, with photos and seasons: the pollen directory

Worst cities for allergies

Grass pollen season

Find an allergist in Hachiōji, Japan

Pollen indexes: a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data. Plant detail: Google Pollen API. Index values are modelled, not measured counts. Sources: CDC/NAB; USA-NPN; GBIF (CC BY); ESA WorldCover (CC BY 4.0).