2001 was the best year of J-pop. Ever.
Ayumi Hamasaki's I am...+Dome Tour
Do As Infinity's Deep Forest+Tour
Chihiro Onitsuka's first album+Tour
Every Little Thing's 4 Force
Hitomi Yaida's Candlize
Shiina Ringo's mayonaka wa junketsu single
Utada Hikaru's Distance
The Brilliant Green's Los Angeles
Mai Kuraki's Perfect Crime
hitomi's I am/innocence single+LOVE LIFE Tour
There's a lot more too for people with other interests. I haven't heard about 1/4 of the stuff I put on that list.