[Unjucky]

For your reference, from the AJKF site:-
http://www.kendo.or.jp/japanese/rule/syogo_dan.html

examiner of 8th Dan (Kendo)
=hanshi, age below 76

No. of examiner votes for passing the 8th Dan exam:
1st practical skill exam (i.e. keiko) =4 out of 6
2nd practical skill exam =7 out of 10
kata/written =2 out of 3 (examiner can be older)

and don't forget the grading requirment for 8th Dan:
After passing 7th dan, and 10 more years of practice, age above 46
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Statistics/results for Kyoto shinsakai, May 2 at Kyoto City Sports Stadium, and May 3 at Kyoto Budo Center:-
Kendo 8th Dan
# of Applicants:=1077, absentees=38, examinee=1039
# of Passes:
1st Practical skill =126; 2nd =12; written =12; kata =12
PASS RATE= 1.2%
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Same thing for Iaido 8th Dan, May 4 at Kyoto Budo Center
# of Applicants:=201, absentees=12, examinee=189
# of Passes:
1st Practical skill =40; 2nd =7; written =7; kata =7
PASS RATE= 3.7%
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btw, we'll never have to worry about all these