Is there a credit hours requirement for applying to a masters course? I am currently taking an undergraduate degree, and by completion, I would have 112 credit hours accumulated. 
This is fine and all if I don't plan to continue my studies or apply to a local university, but I heard some of my seniors getting rejected applying for a master at universities abroad because the credit hours they accumulated were not sufficient, and thus their degree is only acknowledged as a diploma equivalent.

Edit: I am especially interested in universities in US, UK, and Japan, but I am looking for a rather general answer, as in, is it common for universities to reject an application because of credit hours, even though the degree came from an accredited university? 

Edit 2: my main concern is, whether I should take extra credits to ensure I won't run into a road block because of difference in the credit hours standard between universities (instead of say, my performance/cgpa/accomplishments).
No.

Since there is no universal standard for what constitutes a "credit hour", imposing a required number of credit hours is simply impossible.  If you have a degree, you have a degree.

On the other hand, which courses you've taken definitely does matter.  For example:


If you're applying for graduate school in computer science at X, but your classes have small overlap with the undergraduate computer science program at X, that raises a red flag.  That gap makes your undergraduate program look weak, or at least that it develops a different set of skills than the grad program at X normally expects.
If you claim in your application that you're interested in (say) artificial intelligence, but you've never taken an artificial intelligence class, that raises a red flag.  How an you claim interest in a field you've never been seriously exposed to?  How can we judge your abilities in a field where we can't see a single grade?


Of course, all this is secondary to your potential for research excellence, as described in specific and credible detail in your statement and in your recommendation letters.

(I'm on the graduate admissions committee in a US CS department.)