Is a foreign tax refund taxable?

Hello!

 

I worked in Japan for two years and took a foreign earned income exclusion, so I didn't pay U.S. income tax for those years. This year, I received a refund of the money that I had paid into the pension while I was in Japan. (The pension gets returned if you don't stay in Japan.) The total amount of the refund was $1,000 (it was supposed to be $800 after Japanese tax, but my very generous previous employer paid the $200 tax for me, so I received $1,000). My question is, how do I report this on my taxes? Do I add $1,000 to my income and pay regular income tax, or is there something else I should do?