My husband is Japanese and claims our son as dependent in Japan. Could I report my son as my dependent for US tax return?

I am a US citizen living and working in Japan. 

My husband claims our son as his dependent on his Japanese tax documents.

I do not claim our son as my dependent on my Japanese tax documents.

My husband is Japanese so he does not file tax return for the US.

As I am a US citizen, I file my tax return for the US.

Should I claim my son as depended on my US tax return?