Someone roped me into watching Hana Yori Dango because I've been a fan of the manga for years. So glad I did! Classic. 
Mine is Rimitto (Limit).
HANA KIMI! my first asian drama even
My first Jdrama was Sexy Voice and Robo (I'd watched Death Note, and was obsessed with Kenichi Matsuyama)
I really should re-watch it because I cannot remember a damn thing  in the show. Aha!! x
My first Japanese Drama was Gokusen. Still one of my absolute faves :)
Dragon Zakura was my first. 
mine was Good Luck !! 

I'd just finished battle royale and got a crush on mitsuko played by kou shibasaki, so i searched through her movie and drama list and ended up picking good luck !! 

From then i followed the main lead kimura takuya to his dramas and the rest is history lol


Mine was Border with Shun Oguri
Mine's Gokusen. I remember being so crazy about Matsujun back then. :))
Mine was Kimi wa Petto, if I remember correctly.
Hana Yori Dango...or maybe Glass Mask, but this was only with no subtitles and only a few episodes I found on the net, so the real first was HanaDan