Bacterial virus in Japan, is this disease X? Record infections, what's happening

Will disease X that is being talked about so much these days come from Japan? There is apprehension about what is happening in the Land of the Rising Sun, so much so that the football match with North Korea valid for qualifying for the next World Cup has been postponed.
It's all the fault of STSS (streptococcal toxic shock syndrome) which has been raging in Japan for some time: the North Korean Football Federation would have asked not to play the match for fear of a possible spread of the virus in the country.
The WHO has long raised the alarm regarding disease X, that is, a currently unknown pathogen could cause a serious international epidemic.
A fear recently also raised by the popular virologist Ilaria Capua.
In Japan there is concern about a rare and dangerous bacterial infection that is spreading with record speed, so much so that a total of 941 cases of STSS were recorded in the Japanese country last year.
The latest data, however, would suggest that in 2024 the numbers could be much worse than in 2023, given that in Japan in the first two months of the year there have already been 378 cases of streptococcal toxic shock syndrome recorded.
Hence the great attention of the WHO precisely by virtue of the grim prediction of disease X.
read also Disease X more dangerous than Covid.
Ilaria Capua's STSS alarm: will disease X come from Japan? As stated by Ilaria Capua during an interview with Resto del Carlino, disease that because we had the one from Covid we are good for the next 200 years." For several experts, Covid was precisely this announced disease The fear linked to STSS is that in Japan, despite being generally more dangerous for the elderly population, in 2023 it caused proportionately more deaths in the under 50 group: 21 deaths out of 65 infections.
What is worrying is the fact that in Japan 30% of the people who got sick then died, a very high mortality rate and far from that of Covid.
“There are still many unknown factors – explained the National Institute of Infectious Diseases (NIID) – regarding the mechanisms underlying the fulminant (severe and sudden) forms of streptococcus, and at this stage we are not able to explain them”.
If in recent times the fears regarding disease since Covid, replicating the mistakes made in the past would be unforgivable.