There's no difference, in practise, between how the Company handles days off for pilots using different agencies. Most pilots take all of their days off consecutively i.e. 11 days off for AJV. Some pilots split their days off in two, but that's the guys who live 'locally' e.g. Korea.
Our Japanese employers are decent people and they realise we are going to want to take our days off at home and not spend them in Japan, after all, that's the idea of having a commuting contract. I'm 100% confident they are not going to start upsetting the apple cart by giving us 8 days at home and then 2 off in Japan as they could guarantee the riot it would cause. Despite CloudSailor's caution about the literal wording in the contract, I believe you can plan on getting all of your days off consecutively.
I haven't got my contract to hand but if Parc's says '10 consecutive days off' and CReW's says '8' then I know what I'd be doing.