Some myocarditis/pericarditis cases may be included within the unexplained deaths category…

https://www.zerohedge.com/medical/70-percent-deaths-pfizer-vaccine-japan-reported-within-10-days-jab-study

AND

Analysis of the Association Between BNT162b2 mRNA COVID-19 Vaccination and Deaths Within 10 Days After Vaccination Using the Sex Ratio in Japan

https://www.cureus.com/articles/199892-analysis-of-the-association-between-bnt162b2-mrna-covid-19-vaccination-and-deaths-within-10-days-after-vaccination-using-the-sex-ratio-in-japan#!/