D Iwato Guitar Scale
Guitar scale in Open A tuning — fretboard diagram
D Iwato in Open A — Notes and Intervals
The D Iwato scale is a dark and brooding Japanese pentatonic scale. On Guitar, its notes are D, Eb, G, Ab, C. It is essentially a pentatonic Locrian mode, known for its unstable and mysterious character, often used to depict shadows or deep contemplation. Commonly used in Japanese, Metal, Dark Ambient, Experimental. Notable players include Marty Friedman, Meshuggah. Use over diminished or m7b5 chords. Excellent for dark ambient textures and metal riffs with an Eastern edge.
Notes: D, Eb, G, Ab, C
Intervals: 1P, 2m, 4P, 5d, 7m
Degrees: 1 b2 3 4 b5
Formula: H-4-H-4-W
Number of notes: 5
Tuning: Open A (E-A-E-A-C#-E)
About Open A Tuning
Open A tuning (E-A-E-A-C#-E) produces an A major chord when strummed open. It is structurally identical to Open G tuned up one whole step, delivering a brighter, more tense sound that works particularly well for slide guitar centered on the key of A.
Jimmy Page used Open A with a slide on Led Zeppelin's 'In My Time of Dying' from Physical Graffiti (1975). Rory Gallagher also employed Open A for his raw, energetic slide work. Many players achieve Open A by simply placing a capo at the 2nd fret in Open G tuning, which is why dedicated Open A usage is less commonly discussed. However, without a capo, Open A gives direct access to the open A string resonance and a different feel under the fingers due to the higher tension.
Notable artists: Jimmy Page, Rory Gallagher, Delta blues players
Best for: Slide guitar in the key of A, blues playing, and situations where you need the brightness of Open G tuned up without a capo
Musical Character
The darkest Japanese pentatonic — essentially a pentatonic Locrian. Its unstable b5 creates a shadowy, contemplative quality unlike any other pentatonic scale.