My fiancée and I, both Indian citizens, are planning to get married in December, followed by a honeymoon trip to a few places in Europe (Amsterdam, Helsinki, Paris). I reside and work in Japan (since about three years ago), while she resides and works in India. I have a monthly income of around ¥350000 (~€3000), and her monthly income is around INR 40000 (~€500). The trip will largely be paid for by me (flight and hotel bookings).
I understand that the usual advice here is for both of us to apply together. However, I won't be returning to India until just before the wedding, so it's not practical for me to apply in India (assuming I might have to personally go to an embassy or consulate).
How should we apply here? If we apply separately (in India and Japan respectively), should we provide a statement that we will be getting married, and provide both our financial documents with both applications?