Originally Posted by
JALPak
When redeeming online, you have to specify the relationship using the drop-down menu. If done over the phone, the agent would ask the same question. I wouldn't suggest lying about this.
Ask JAL to see if they could redeposit half of the SPG points into your account and then make the transfer via your friend's account again. It's a long shot but doesn't hurt asking.
AFAIK, unless you are JFC member, as in my case, they really have no way of knowing who is family? After all what is family?