Hi, first time posting on this forum!

I'm currently residing in Japan and primarily fly JAL for business. Last year I achieved JMB Sapphire level, and am enjoying to perks until March 2020. I'm interested in applying for one of the JGC credit cards, so I can be a JGC member, in case I don't reach the 50,000 fly-on point requirement this year. What I'm confused about is, do I need a specific application to join the program? If I apply for a JAL CLUB-A card, and am a sapphire member, does that already make me officially a member of JGC? Will I automatically get the card with the JGC logo on it, or do I have to specifically request it / do a special application for it?

Thanks for your help!
Dan