Re: Asking to Postpone Shodan Test?
On the one hand, your sensei should have a better understanding of your level than you do. He has the greater experience and it is easier to judge someone else's ability than to judge your own.
On the other hand, I have seen a lot of people who's senseis thought were ready get failed by the shihans. Then again, in such situation, it is the sensei that really ends up looking bad, while for you it would depend on how embarrassed you would feel by the experience.