Over 90% of Reported Suicides(of Politically Important Person) Were Murdered - Masahiko Ueno, Former Chief Officer of Tokyo Medical Examiner's Office, claimed.
I strongly believe that those are the famous case but Juzo Itami (伊丹 十三, 64), film maker & Yutaka Ozaki (尾崎 豊, 26) singer song writer, were murdered by the Japanese gangsters.
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The Tokyo Medical Examiner's Office( 東京都監察医務院) is responsible for conducting postmortem examination and for determining the cause of death for all cases of unnatural death within Tokyo's 23 wards. ....
In the year 2013, the Tokyo Medical Examiner's Office performed 13,593 medical examination and conducted 2,338 autopsies. The daily average number of medical examinations was 37.2 and that of autopsies was 6.4. <The number of medical examination accounts for roughly 18% of the total number of deaths in Tokyo's 23 wards.> That means that one out of 5.5 persons die of unknown causes or accidents that require inspection by medical examiners. (Excerpt from its official page) ---