Baggage for connecting flight?

Hi,

I will take a connecting flight from Hiroshima to Haneda and then Narita to Hanoi via japan airlines.
So with domestic flight, can i have them same check-in baggage quantity (2 pieces with total 46kg)? and do i have to transfer my baggages from Haneda to Narita by my self?

arigato gozaimasu.

Luggage policies depend on the airlines and purchase conditions. Unless you purchased the domestic and international flight together from the same airline, domestic luggage policies will apply to your domestic flight (and even if you do, it may not be the case).

ANA:
http://www.ana.co.jp/wws/japan/e/local/dom/checkin/baggage/

JAL:
http://www.jal.co.jp/en/dom/service/bags/

Luggage transfer between Haneda and Narita will be your responsibility.