I think you guys got all the songs by the main J-Pop girls.. Except, everybody probably knows Namie Amuros
Body Feels EXIT, along with Hikki's
Can You Keep A Secret? (I don't think anybody said that one..) Kumi's
TAKE BACK is probably one everybody knows, since it's the debut, and
Butterfly is at least very well-known, since that was her breakthrough. ..Oh, and did anybody mention any Mika Nakashima?
Yuki no Hana is probably her overall biggest. And MISIA's
Everything is definitely known by a lot of people, because it's always in those 'top love songs' lists, along with Hikki's First Love and such. Oh! And Ringo Shiina's first song, Koko de KISS Shite is pretty big (just saw Zyo already said that though :X), along with her
Ringo no Uta... Did anybody mention any of Ai Otsuka? Her first album was huge, and she had a few really big hits afterwards, too. Considering the chart length, every person in Japanese has HAD to of heard
Sakuranbo at least once. XD ayaka's hits are probably starting to become known all around, too, like
I believe.
Tryin' to think of some rock bands, hah... Of course, a few B'z songs (like
PIERROT - which would also be very well known by Aya Kamiki's version
). Hm.... L'arc~en~Ciel's
READY STEADY GO is their biggest, of course. So I'm sure at least a lot of people have heard that one.
OH! hide!! How could I forget him???
PINK SPIDER. Everybody's heard that. Probably a few other of his songs, too, like
LEMONed I Scream or
Beauty & Stupid. And while we're on that note, X JAPAN's
Tears,
Silent Jealousy and
Kurenai are all huge.
And everybody~ should know
I LOVE YOU, originally by Yutaka Ozaki.
Why, even Hitomi Shimatani's brand new album contained yet another cover of it (which is a very good cover, by the way
).
There's tons more, of course..... This question is kinda un-answerable when you think about it, hah. Because we're all picking people's biggest hits, but you know there's at least a few weirdos who have never heard these. XD And then on the other hand, big hits, but ones that aren't staples or anything, are also very possibly known by everybody. Like Ayu's HEAVEN. It's pretty recent and after her peak ended and everything, but it's still really known. Same with, say, Yuki Koyanagi's Anata no KISS wo Kazoemashou. She's not extremely known, and I can't even remember the last time she released, but that was huge when it came out. So a lot of people probably know that one...
So yeah. It's all kind of opinion, in the end. XP