Perhaps if you let us know what bands you have listened to and really dislike, that would be helpful.......
I mean, its been said before and it'll be said many times again, that every country under the sun has its share of crap music. And, sad to say, it's often the stuff that gets most promoted and heard everywhere that is some of the crappiest of all.
Some good singers that I can think of off the top of my head are Tatsurou from MUCC, Asagi from D, Mao from SID, and Lucifer Luscious Violenoue (solo female artist). But if you aren't into that type of music, maybe you haven't listened to these people. (And because I'm into a certain type of music, it's difficult for me to recommend singers outside of that genre because my knowledge isn't good :sorry: - at least, for Japanese music.)
A lot of the music that gets discussed in this j-pop forum is actually not very mainstream in Japan, so it is unlikely that many posters here are into that irritating music that you hear played everywhere. In fact, there has been a conversation about one band (Dir en grey) that is one of the most popular Japanese bands among non-Japanese fans, but - while still having high record sales and sellout concerts - does not
appear to be as well known/liked in Japan as it would first seem from a Western perspective.
I guess what I'm trying to say, in a roundabout way, is that the Japanese music that us Westerners like tends to be a bit different from the music that is most popular in Japan.
Take the UK pop scene, for example (thinking of the charts). Personally, I find most of chart music to be crap. Obviously lots of people buy it, though. I have no idea why. But I honestly find the music of less well-known bands to be more interesting to me. And, I particularly like a certain genre, which happens to be rock and rock-metalish music, so that's what I listen to. And of course, when I discovered Japanese music, I listened to the same genre. But rock music - at least, heavy rock - very rarely finds its way into the UK pop charts, and I would guess the same thing is true in Japan.
Not into rock music? Try the songs of Yae. Mycernius send me one of her songs once, and her voice seems very good to me.
What type of music are you into, usually? If you let us know I am sure people will be more than happy to make you recommendations of good Japanese musicians in those genres.