artist,genre,country
J'ACCUSE..!,Crossover Prog,Italy
J. A. CAESAR,Psychedelic/Space Rock,Japan
J.E.T.,Rock Progressivo Italiano,Italy
J.R.B SYMPHONY,Progressive Metal,Spain
J21,Crossover Prog,Spain
JACK DUPON,RIO/Avant-Prog,France
JACK O' THE CLOCK,Prog Folk,United States
JACK YELLO,Heavy Prog,Germany
JACKAL,Heavy Prog,Canada
JACKO WACKO,Psychedelic/Space Rock,Peru
JACKS,Psychedelic/Space Rock,Japan
JACKSON HEIGHTS,Prog Related,United Kingdom
AND ACKSON,Psychedelic/Space Rock,United Kingdom
RONALD SHANNO ACKSON,Jazz Rock/Fusion,United States
JACULA,Rock Progressivo Italiano,Italy
JADE,Psychedelic/Space Rock,France
JADE WARRIOR,Psychedelic/Space Rock,United Kingdom
JADIS,Neo-Prog,United Kingdom
JAÉN KIEF,Crossover Prog,Colombia
JAGA JAZZIST,Jazz Rock/Fusion,Norway
JAHRTAL,Prog Folk,Austria
LO AIVAS,Prog Folk,Chile
JAKEL,Experimental/Post Metal,Canada
JAKOB,Post Rock/Math rock,New Zealand
JAKKO M AKSZYK,Canterbury Scene,United Kingdom
JALAYAN,Psychedelic/Space Rock,Italy
JAM CAMP,Jazz Rock/Fusion,United States
JAM IT!,Jazz Rock/Fusion,Russia
JAMBINAI,Post Rock/Math rock,Korea
JAN DUKES DE GREY,Prog Folk,United Kingdom
JANA DRAKA,Crossover Prog,Italy
JANE,Heavy Prog,Germany
JANISON EDGE,Neo-Prog,United Kingdom
JANOS VÁRGA PROJECT,Eclectic Prog,Hungary
BER ANSCH,Prog Related,United Kingdom
BENN ANSSON,Jazz Rock/Fusion,Sweden
JANUS,Rock Progressivo Italiano,Italy
JANUS,Crossover Prog,United Kingdom
JANVS,Experimental/Post Metal,Italy
JAPAN,Prog Related,United Kingdom
JAPANSKI PREMIJERI,Eclectic Prog,Croatia
JARDÍN DE LA CROIX,Post Rock/Math rock,Spain
JARDIN DE PIEDRA,Heavy Prog,Peru
JARGON,Crossover Prog,Greece
JARKA,Jazz Rock/Fusion,Spain
JEAN-MICHE ARRE,Prog Related,France
JÄRVET,Crossover Prog,Finland
RO ARZOMBEK,Tech/Extreme Prog Metal,United States
JASPER WRATH,Crossover Prog,United States
JASTREB,Psychedelic/Space Rock,Croatia
JAUGERNAUT (A.D.),Crossover Prog,United States
CATHERIN AUNIAUX,RIO/Avant-Prog,Belgium
JAZ,Crossover Prog,France
JAZZ PISTOLS,Jazz Rock/Fusion,Germany
JAZZ Q,Jazz Rock/Fusion,Czech Republic
JAZZCOMPUTER.ORG,Progressive Electronic,France
JB FAIRFIELD,Crossover Prog,Australia
JEAN LOUIS,RIO/Avant-Prog,France
JEAVESTONE,Eclectic Prog,Finland
JEBEL,Crossover Prog,United States
JED,Prog Folk,United States
JEFFERSON AIRPLANE,Proto-Prog,United States
JEJE GUITARADDICT,Progressive Metal,Indonesia
JELLY FICHE,Symphonic Prog,Canada
TH ELLY JAM,Psychedelic/Space Rock,United States
JENGHIZ KHAN,Heavy Prog,Belgium
JENIFEREVER,Post Rock/Math rock,Sweden
IAI ENNINGS,Neo-Prog,United Kingdom
JENZEITS,Progressive Electronic,United States
JEREMY,Crossover Prog,United States
JEREMY IRONS AND THE RATGANG MALIBUS,Crossover Prog,Sweden
JERONIMO,Krautrock,Germany
JERSEYBAND,RIO/Avant-Prog,United States
JESDAT,Progressive Electronic,Spain
JESETER,Neo-Prog,Czech Republic
JESTER,Crossover Prog,United States
JESTER,Prog Folk,United Kingdom
JESTER'S JOKE,Rock Progressivo Italiano,Italy
JESTER'S MARCH,Tech/Extreme Prog Metal,Germany
TH ESTERDAYS,Prog Folk,Greece
JESU,Experimental/Post Metal,United Kingdom
JESUS WITH ME,Psychedelic/Space Rock,United States
JET BLACK SEA,Crossover Prog,Netherlands
JET LAG,Rock Progressivo Italiano,Italy
JETHRO TULL,Prog Folk,United Kingdom
JETHZABEL,Progressive Metal,Ecuador
JEWY SABATAY,Experimental/Post Metal,Serbia
JHIMM,Crossover Prog,United States
JIHEL,Progressive Electronic,France
JIMI SUMÉN PROJEKT,RIO/Avant-Prog,Finland
JIMMY CHAMBERLIN COMPLEX,Heavy Prog,United States
JIMMY YOKO & SHIN,Jazz Rock/Fusion,Japan
GEORG INDA,Jazz Rock/Fusion,Hungary
JINETE AZUL,Jazz Rock/Fusion,Argentina
JINETES NEGROS,Progressive Metal,Argentina
JINJER,Tech/Extreme Prog Metal,Ukraine
GUSTAV OBIM,Progressive Electronic,Brazil
EDDI OBSON,Progressive Electronic,United Kingdom
JODY GRIND,Crossover Prog,United Kingdom
TH OE K-PLAN,Post Rock/Math rock,Spain
BJÖR OHANSSON,Symphonic Prog,Sweden
JEN OHANSSON,Jazz Rock/Fusion,Sweden
JOHN FRUM,Tech/Extreme Prog Metal,United States
JOHNNY BOB,Neo-Prog,Germany
JOHNNYTWENTYTHREE,Post Rock/Math rock,United States
ALPHONS OHNSON,Jazz Rock/Fusion,United States
SCOT OHNSON,RIO/Avant-Prog,United States
JOIN IN,Jazz Rock/Fusion,Germany
JOLLY,Neo-Prog,United States
JON & VANGELIS,Prog Related,United Kingdom
JON OLIVA'S PAIN,Progressive Metal,United States
FRYDERY ONA,Progressive Electronic,Germany
JONAS MUNK & NICKLAS SŘRENSEN,Progressive Electronic,Denmark
JONATHAN,Progressive Electronic,Germany
JOHN PAU ONES,Heavy Prog,United Kingdom
NIGEL MAZLY ONES,Prog Folk,United Kingdom
JONESY,Heavy Prog,United Kingdom
JONO,Crossover Prog,Sweden
JONO EL GRANDE ,RIO/Avant-Prog,Norway
LARS ONSSON,RIO/Avant-Prog,Sweden
JORDSJŘ,Symphonic Prog,Norway
JORK,RIO/Avant-Prog,Ireland
JORM,Crossover Prog,Sweden
JOSEPH MAGAZINE,Progressive Metal,Poland
BRYA OSH,Prog Related,United Kingdom
JOUIS,Crossover Prog,United Kingdom
JOURNAL,Tech/Extreme Prog Metal,United States
JOURNEY,Prog Related,United States
JOVENABUELO,Post Rock/Math rock,Chile
JOVIAC,Heavy Prog,Finland
JOX,Prog Folk,France
JOY HEIGHTS,Psychedelic/Space Rock,Japan
JOY UNLIMITED,Eclectic Prog,Germany
JOY WANTS ETERNITY,Post Rock/Math rock,United States
JÜ,Jazz Rock/Fusion,Hungary
JUAN S. GARCÉS,Progressive Metal,Ecuador
JUD'S GALLERY,Krautrock,Germany
JUGGERNAUT,Experimental/Post Metal,Italy
JUGLANS REGIA,Heavy Prog,Italy
JAKO UHKAM,RIO/Avant-Prog,Estonia
JUKE,Psychedelic/Space Rock,France
JULIAN'S TREATMENT,Eclectic Prog,United Kingdom
JULIE'S HAIRCUT,Psychedelic/Space Rock,Italy
JULIA ULIEN,Jazz Rock/Fusion,France
JULVERNE,RIO/Avant-Prog,Belgium
JUMBO,Rock Progressivo Italiano,Italy
JUMP,Neo-Prog,United Kingdom
JUMP FOR JOY!,RIO/Avant-Prog,Multi-National
JUNE CLEAVER AND THE STEAK KNIVES,Eclectic Prog,United States
JUNE OF 44,Post Rock/Math rock,United States
JUNEGRASS,Krautrock,United States
JUNG PEOPLE,Post Rock/Math rock,Canada
JUNGLE,RIO/Avant-Prog,Japan
JUNIPHER GREENE,Heavy Prog,Norway
JUNIUS,Post Rock/Math rock,United States
JUNK FARM,Heavy Prog,Germany
JUNON / EX GENERAL LEE,Experimental/Post Metal,France
JUPITER HOLLOW,Progressive Metal,Canada
JUPITER SOCIETY,Progressive Metal,Sweden
JUPU GROUP,Jazz Rock/Fusion,Finland
JUS PRIMAE NOCTIS,Rock Progressivo Italiano,Italy
JUSTINE,RIO/Avant-Prog,Canada
JUSTINE,Prog Folk,United Kingdom
JUTRO,Jazz Rock/Fusion,Yugoslavia
JUUDAS ISKARIOTIN SUUDELMA,Psychedelic/Space Rock,Finland