Ambassador: Japan Airlines
Join Date: Mar 2008
Location: LAX
Programs: JAL Mileage Bank, JMB Diamond, oneworld Emerald, Bonvoy Platinum
Posts: 16,394
JAL will be using BA lounges (and agents) at BOS
http://www.jal.co.jp/en/inter/lounge/america/bos/
Emeralds -> BA F Lounge
Sapphire/Business/Normal Fare Y -> BA Terraces Lounge
Looks like ground agents will be BA ones too according to photos uploaded to the Facebook page:
https://www.facebook.com/media/set/?...3850783&type=1