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Royal road progression
The royal road progression (王道進行, ōdō shinkō), also known as the IVM7–V7–iii7–vi progression or koakuma chord progression (小悪魔コード進行, koakuma kōdo shinkō), is a common chord progression within contemporary Japanese pop music.
It involves the seventh chords of IV, V, and iii, along with a vi chord; for example, in the key of C major, this would be: FM7–G7–Em7–Am. The progression is also very often found with a vi7 chord in place of the vi, thereby making every chord in the progression a seventh chord.
The chord progression may be resolved with the tonic chord, for example in a IVM7–V7–I or a ii7–V7–I progression. IVM7–V7–iii7–vi–ii7–V7–I creates a full circle of fifths progression in the major mode, with V7 substituting for vii°. In C major, this would be FM7–G7–Em7–Am–Dm7–G7–C.
The basic progression can be found in two versions. The first uses V7 in its third inversion (G7/F), the other uses V7 in its root position (G7). The former appears in lushly orchestrated pop arrangements, while the latter appears mainly in rock and electronic music.
In a minor key, there are two versions of the progression: VIM7–VII7–v7–i and iv7–v7–IIIM7–VI. The first version can be thought as an essential iv–v–v–i with the VI and VII chords substituting for the iv and v respectively, or as a VI–ii°–v–i with the ii° being substituted by the VII chord. For the second version, a cadential suffix may be added, such as iv7–V7–i or iiø7–V7–i. When resolved by iiø7–V7–i, a large progression iv7–v7–IIIM7–VI–iiø7–V7–i is created, where the v7 substitutes for the VII. In A minor, this would be Dm7–Em7–CM7–F–Bm7(♭5)–E7–Am.
Variations on the royal road progression may include IVM7–V7–IM7–vi, ii7–V7–iii7–vi, or IVM7–viiø7–iii7–vi for the major version, and iv7–VII7–v7–i, iiø7–VII7–v7–i, VIM7–iiø7–v7–i, or iv7–VII7–IIIM7–VI for the minor version.
When this progression is resolved by a ii7–V7–I cadence, it becomes IVM7–V7–iii7–vi–ii7–V7–I, a sequence of descending fifths with V7 substituting for the vii° chord. The sequence of descending fifths was used regularly in tonal music since the Baroque era.
In Western pop music, the progression can be used without the seventh notes, so that it becomes IV–V–iii–vi. If resolved by an ii–V–I cadence, this becomes IV–V–iii–vi–ii–V–I.
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Royal road progression
The royal road progression (王道進行, ōdō shinkō), also known as the IVM7–V7–iii7–vi progression or koakuma chord progression (小悪魔コード進行, koakuma kōdo shinkō), is a common chord progression within contemporary Japanese pop music.
It involves the seventh chords of IV, V, and iii, along with a vi chord; for example, in the key of C major, this would be: FM7–G7–Em7–Am. The progression is also very often found with a vi7 chord in place of the vi, thereby making every chord in the progression a seventh chord.
The chord progression may be resolved with the tonic chord, for example in a IVM7–V7–I or a ii7–V7–I progression. IVM7–V7–iii7–vi–ii7–V7–I creates a full circle of fifths progression in the major mode, with V7 substituting for vii°. In C major, this would be FM7–G7–Em7–Am–Dm7–G7–C.
The basic progression can be found in two versions. The first uses V7 in its third inversion (G7/F), the other uses V7 in its root position (G7). The former appears in lushly orchestrated pop arrangements, while the latter appears mainly in rock and electronic music.
In a minor key, there are two versions of the progression: VIM7–VII7–v7–i and iv7–v7–IIIM7–VI. The first version can be thought as an essential iv–v–v–i with the VI and VII chords substituting for the iv and v respectively, or as a VI–ii°–v–i with the ii° being substituted by the VII chord. For the second version, a cadential suffix may be added, such as iv7–V7–i or iiø7–V7–i. When resolved by iiø7–V7–i, a large progression iv7–v7–IIIM7–VI–iiø7–V7–i is created, where the v7 substitutes for the VII. In A minor, this would be Dm7–Em7–CM7–F–Bm7(♭5)–E7–Am.
Variations on the royal road progression may include IVM7–V7–IM7–vi, ii7–V7–iii7–vi, or IVM7–viiø7–iii7–vi for the major version, and iv7–VII7–v7–i, iiø7–VII7–v7–i, VIM7–iiø7–v7–i, or iv7–VII7–IIIM7–VI for the minor version.
When this progression is resolved by a ii7–V7–I cadence, it becomes IVM7–V7–iii7–vi–ii7–V7–I, a sequence of descending fifths with V7 substituting for the vii° chord. The sequence of descending fifths was used regularly in tonal music since the Baroque era.
In Western pop music, the progression can be used without the seventh notes, so that it becomes IV–V–iii–vi. If resolved by an ii–V–I cadence, this becomes IV–V–iii–vi–ii–V–I.