I suspect most of us here aren't familiar with MontBell's Japanese bags -- and our Japanese readers probably won't know about the MontBell bags sold here in the US. My guess is that they're all made in China anyway, so the zippers probably can mate. However, that's just a guess on my part. Sorry, not much help.
For such specific questions, I recommend that you give MontBell customer service a call so you can get your answers direct from them.