Japanese citizenship?

Question:

Apparently it is easier for a foreigner to obtain Japanese citizenship than a Japanese permanent residence because it takes a minimum of 5 years of stay in Japan to get citizenship as compared to 10 years for PR.

Is this true?

And other than English/Mandarin translators and teachers, what other jobs in Japan are in demand for foreigners?

Answer:

The number of years is just one condition. Generally, it's more likely that PR be granted on you than citizenship after you applied for it.

So we can't say that it's easier to get citizenship than PR.

>And other than English/Mandarin translators and teachers, what other jobs in Japan are in demand for foreigners?

Not so many. Maybe, import-export job.

Addition:
3day's case (3 years) was possible because he was on spouse visa. You can get PR after you have lived in Japan for 3 years under spouse visa. I did not write it first because it's a special case and not for everyone.