I used to love jpop but it got really, REALLY boring to me. Everything started to sound the same. Their popular charts are STILL so stuck in the past and fresh new artists get buried under their weight. All these acts are super popular now and chart highly with every new release, even though they debuted years ago:
Arashi (Debuted in 1999)
EXILE (2001)
Lead (2002)
AKB48 (2005)
Southern All Stars (1978)
Mr.Children (1989)
Kobukuro (1998)
Pornograffiti (1994)
SMAP (1988)
KAT-TUN (2001)
TOKIO (1994)
(actually all Johnny's boybands)
The pop charts in Korea are full of fresher sounds, save for the rare anomaly like Shinhwa.
There are some cool Japanese acts like Perfume, but most of the Japanese music that I like these days (which isn't a whole lot) doesn't really sell there. I'm a big fan of FEMM but they flopped hard. The new CAPSULE album was cool too.
Utada needs to come back and save jpop.