Reported varicella surveillance for Japan (JPN) — — latest record 2026-11-01
No varicella case count has been reported for Japan so far in 2026. Our data cover only part of 2025, so no full-year 2025 figure is shown.
ENCLAI has logged 1,559 surveillance records for varicella in Japan in 2026, with the most detailed reporting in Apr 2026 (317 records). 181 of those arrived in the last 30 days; the case counts run to 2026-10-12. 2 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: JIHS/NIID — Prefecture-Level Infectious Disease Surveillance (IDWR)
One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.
| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | not reported | — |
| 2024 | not reported | — |
| 2025 | incomplete year | — |
| 2026 (year to date) | not reported | — |
Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting varicella to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.
| Month | Records | Reporting sources |
|---|---|---|
| Apr 2026 | 317 | 1 |
| May 2026 | 231 | 1 |
| Jun 2026 | 184 | 1 |
| Jul 2026 | 232 | 2 |
| Aug 2026 | 183 | 1 |
| Sep 2026 | 187 | 1 |
| Oct 2026 | 182 | 1 |
| Nov 2026 | 43 | 1 |
A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases. 181 records were logged in the last 30 days.
Areas within Japan with the most varicella records this year:
| Area | Records |
|---|---|
| Aichi | 34 |
| Aomori | 34 |
| Chiba | 34 |
| Ehime | 34 |
| Fukuoka | 34 |
| Country | 2026 cases | Trend |
|---|---|---|
| Poland | 73,825 | ▼ Declining · 2025 |
| South Korea | 32,970 | ≈ Stable · 2025 |
| Colombia | 23,421 | |
| Sri Lanka | 8,668 | |
| Mongolia | 6,839 | ≈ Stable · 2025 |
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One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.
