Japan: 2026 Measles

[Shiloh]

Source: https://www.mixvale.com.br/2026/02/...-and-generates-vaccination-alert-in-japan-en/

Measles outbreak at Aichi school affects seven students and generates vaccination alert in Japan
By Bruna
• February 19, 2026

The province of Aichi, in Japão, confirmed that the number of students infected with measles at a secondary school in the region of Higashi Mikawa rose to seven after new diagnoses carried out this Wednesday. The most recent cases involve two young men, residents of the cities of Tahara and Toyohashi, who attend the same educational institution where the outbreak was initially detected between the 16th and 17th of February.

Local health authorities reported that none of the seven patients had a recent history of international travel, which supports the theory that the spread of the virus occurred directly within the school environment. Monitoring of the health conditions of students and staff was intensified to prevent the transmission chain from extending to other communities in the province.​..

 

[Shiloh]

Source: https://japannews.yomiuri.co.jp/society/general-news/20260226-313647/

Tokyo Measles Patient Traveled to Fukuoka Aboard JAL Planes; Suspected of Having Been in Contact with Many People
The Yomiuri Shimbun
17:08 JST, February 26, 2026​

A man living in Tokyo who traveled to and from Fukuoka last week on Japan Airlines planes was confirmed to be infected with measles, raising concerns over how many people he came into contact with, the Tokyo metropolitan government said.

The man in his 40s flew from Haneda Airport to Fukuoka on Friday morning on JAL Flight 313 and returned to Tokyo in the evening the following day on JAL Flight 322.​..

 

[Shiloh]

Source: https://www.japantimes.co.jp/news/2026/03/18/japan/science-health/measles-japan-alarm/

Japan raises alarm over recent measles outbreaks in Tokyo and other cities
The health ministry in Tokyo’s Chiyoda Ward. Japan has seen a total of 100 confirmed measles cases so far this year.
By Tomoko Otake
Mar 18, 2026


Japan’s health authorities are raising the alarm over recent measles outbreaks, including group infections at a dining establishment in Tokyo’s Shinjuku Ward.

The Tokyo Metropolitan Government announced Tuesday that a total of nine people, all males in their 20s working for the same eating and drinking venue, had been infected. The first person fell ill on Feb. 27. None of the nine had traveled abroad recently.

Japan has seen a total of 100 confirmed cases so far this year, with cases growing at a faster pace than last year, which saw 265 infections reported for the entire year. By prefecture, Tokyo has seen the most cases with 19, followed by 18 in Aichi and 10 each in Kanagawa and Niigata, according to the latest tally released Tuesday by the Japan Institute for Health Security (JIHS).

In Aichi, an outbreak at a high school in mid-February saw 14 students, one teacher and one business contractor infected.​..

 

[Shiloh]

Source: https://japannews.yomiuri.co.jp/society/general-news/20260324-318414/


Measles in Tokyo: 4 New Patients May Have Come into Contact with Many People, 2 of them Flew, Arrived at Haneda, Narita Airports​
The Yomiuri Shimbun

20:52 JST, March 24, 2026

Four of the people confirmed in Tokyo to be infected with measles between March 17 and 20 may have come into contact with many people in airplanes and airports, among other places, the Tokyo metropolitan government said Tuesday.

The cumulative number of measles cases this year stood at 41, exceeding the 34 cases logged for the entire previous year.

According to the metropolitan government, a man in his 20s residing outside Tokyo boarded All Nippon Airways Flight 850 from Bangkok and arrived at Haneda Airport at 5:45 a.m. on March 10. After that, he may have come into contact with many people at the arrival lobby on the first floor of Terminal 1 and the basement level (between about 8 a.m. and 1 p.m., and between about 4 p.m. and 8 p.m. respectively), as well as in the departure lobby on the third floor of Terminal 3 (between about 1 p.m. and 4 p.m.). He developed symptoms on March 7, and his infection was confirmed on March 17.

A man in his 30s living in Tokyo boarded Jin Air Flight 218 from Narita Airport, bound for Incheon Airport, South Korea, at 12:40 p.m. on March 7. He returned to Narita Airport on Jin Air Flight 217 on the morning of March 8. From March 10 to 16, he shopped for about 15 minutes each evening at the “York Foods with The Garden Jiyugaoka Shinjuku Tomihisa Store” (Shinjuku Ward). He developed symptoms on March 8, and his infection was confirmed on March 18.​..

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Source: https://www.asiae.co.kr/en/article/2026032416581341198

After a Period of Quiet, Surge in Measles Cases Puts Japanese Health Authorities on High Alert
by Kim Hyunjeong1
Published 24 Mar.2026 17:06(KST)
Updated 24 Mar.2026 19:57(KST)

Measles, which had largely disappeared from Japan for a period, is now showing signs of resurgence, putting health authorities on high alert. The number of patients this year has already surpassed four times the number recorded during the same period last year, and cases are being identified even among individuals with no history of overseas travel, indicating a broader spread.​

According to Fuji News Network (FNN) and Kyodo News on March 24, the National Institute of Infectious Diseases (NIID) in Japan reported that as of March 15, there had been 139 confirmed cases of measles this year. This is an increase of 32 cases in just one week, and more than four times higher than the 32 cases reported during the same period last year. It is the highest number since the outbreak of COVID-19.

Japan received "measles elimination" certification from the World Health Organization (WHO) in 2015, but the situation has changed recently as imported cases have increased. The number of measles patients in Japan soared to around 700 in 2019, dropped to fewer than 10 during the COVID-19 pandemic, but has begun to rise again. In fact, there were 265 cases last year, and the pace of increase is even faster this year.​

Notably, infections are now being confirmed even among people with no history of overseas travel. Experts believe that the virus, brought in by foreign visitors or Japanese nationals returning from abroad, has started to spread more widely within Japan...

 

[Shiloh]

Source: https://www.asahi.com/ajw/articles/16499950


Measles cases more than triple, likely spread from overseas
By ERIKO CHIBA/ Staff Writer
April 15, 2026 at 17:52 JST

Measles cases are surging in Japan, with health officials reporting a more than threefold increase compared to 2025 as infections climb faster than at any point in the last several years.

Preliminary figures through April 5 indicated a total of 236 cases have been reported so far this year, the Japan Institute for Health Security announced on April 14.

This represents a 3.5-fold increase compared with the same period last year.

After COVID-19 prevention measures were relaxed, the number of cases has risen year by year, reaching the fastest pace since 2020.​..

...By prefecture, Tokyo reported the highest number of cases with 72, followed by Kagoshima Prefecture with 27 and Aichi Prefecture with 23.

By age group, those 20 to 29 who were infected account for 28 percent, while those ages 15 to 19 and 30 to 39 each account for 22 percent.​..

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[Shiloh]

Source: https://www3.nhk.or.jp/nhkworld/en/news/20260421_18/

Measles cases in Japan surpass last year's total
10 hours ago

Measles cases are increasing across Japan at the fastest pace since 2020. This year's number has already surpassed last year's total.

The Japan Institute for Health Security says 56 cases were initially reported during the week through April 12. There have been a total of 299 cases so far this year, topping last year's figure of 265.

Thirty patients, or about 10 percent of the total, are believed to have been infected overseas in countries such as Indonesia and New Zealand.​..

 

[Shiloh]

Source: https://www.straitstimes.com/asia/e...60-so-far-in-2026-with-many-reported-in-tokyo

Measles cases in Japan rise past 360 so far in 2026, with many reported in Tokyo
Published Apr 28, 2026, 10:00 PM
Updated Apr 28, 2026, 10:20 PM

TOKYO – The number of measles cases in Japan reached 362 in 2026 as at April 19, according to a preliminary figure released on April 28 by the Japan Institute for Health Security (JIHS).

There were 57 cases reported for the week up to April 19, the second-highest after the previous week with 62 cases, according to the national institute.

Many cases were reported in the Tokyo metropolitan area. By prefecture, Tokyo was at the top with 153 cases, followed by Kanagawa with 36, Kagoshima with 34 and Chiba with 24. Saitama had 22 cases, according to the JIHS​...

 

[Pathfinder]

Infectious Disease Surveillance Report (IDWR)

• Breaking news graph (PDF)

April 28, 2026: A preliminary graph has been posted.

Week 16 of 2026 (as of April 22, 2026) (PDF: 873KB)

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https://id-info.jihs.go.jp/surveillance/idwr/diseases/measles/graph/2026/meas26-16.pdf

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[Shiloh]

Source: https://www.dimsumdaily.hk/japan-measles-cases-top-400-since-january/


Japan measles cases top 400 since January
By Dimsum Daily Newsroom -
1:03PM Sat May 9, 2026

9th May 2026 – (Tokyo) Japan has reported more than 400 measles infections since the start of the year, marking a sharp increase compared with recent years, according to data released on Friday by the Japan Institute for Health Security.

Health authorities recorded 68 new cases in the week ending 26th April, bringing the cumulative total for 2026 to 436. By contrast, 96 cases were reported during the same period last year, while the total number of infections for the whole of 2025 stood at 265.

Tokyo has been particularly affected, accounting for 211 cases — nearly half of the national figure. When neighbouring prefectures including Kanagawa, Chiba and Saitama are included, the wider Tokyo metropolitan area has registered more than 300 cases...


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[Shiloh]

Source: https://www3.nhk.or.jp/nhkworld/en/news/20260526_24/

Measles cases in Japan this year approaching 500
6 hours ago

Japan's tally of measles cases so far this year stands at nearly 500, approaching the level of the same period in 2019, which had the most cases in the past decade.

Measles is caused by a highly contagious virus that can spread through the air. It causes fever, coughing and rashes and can be fatal.

The Japan Institute for Health Security says in the week through May 17, the number of reported cases was 17, bringing the total for the year to 498.

The institute estimates that about 70 percent of the patients were infected in Japan by a virus that had been brought into the country.​..