What Is the Ryukyu Scale?

The bright sound of the sanshin, or the springy melodies you dance to in an eisa — you can tell Okinawan music is Okinawan in an instant, and that comes from the Ryukyu scale. It takes the seven-note major scale (Do Re Mi Fa So La Ti) and removes “Re” (the 2nd) and “La” (the 6th), leaving just Do-Mi-Fa-So-Ti.

Hear it first

It is faster to feel this than to read about it. Use the player above: hear the plain seven-note Do-Re-Mi first, then the five-note Ryukyu version. Then listen to “Twinkle Twinkle Little Star” in the Ryukyu scale — with Re and La gone, it suddenly sounds as if it were being plucked on a sanshin.

You can also check it in the Scale Dictionary.

1. Open the Scale Dictionary
2. Set the root to C and the scale to “Ryukyu”
3. Trace the keyboard — there is no Re or La, and two pairs sit a half step apart: Mi–Fa and Ti–Do
4. Switch back to major (seven notes) on the same root and hear Re and La return

How the scale works

The major scale (Do Re Mi Fa So La Ti) has two spots where notes sit a half step apart: Mi–Fa and Ti–Do. The Ryukyu scale keeps both of those half steps on purpose and removes only Re and La, the notes between them.

• Removed: the 2nd (Re) and 6th (La)
• Remaining: Do-Mi-Fa-So-Ti (five notes)
• Half-step pulls kept: Mi–Fa (3–4) and Ti–Do (7–1)

This is the exact opposite of Yona-nuki, which removes Fa and Ti to erase the half steps and soften the edges. By keeping two half steps, the Ryukyu scale gains a distinctive, tense brightness — and that is what makes it sound Okinawan (see Music of Okinawa on Wikipedia).

How it differs from Yona-nuki (the same idea, reversed)

The Ryukyu scale gets interesting the moment you set it next to Yona-nuki. Both come from the same idea — a “Japanese scale” made by dropping two notes from the seven-note scale — but which two notes they drop is reversed.

• Yona-nuki (drop 4 and 7, Fa and Ti) → Do-Re-Mi-So-La → the nostalgic, mainland feel of school songs and J-pop
• Ryukyu, also called Niro-nuki (drop 2 and 6, Re and La) → Do-Mi-Fa-So-Ti → the tense brightness of Okinawa

Yona-nuki removes the half steps, so it sounds plain and rounded; the Ryukyu scale keeps them, so it sounds taut. The same “Japanese scale” produces completely different characters for the mainland and for Okinawa simply because the two omitted notes differ. Play both on the same root and the difference is immediate.

Where you hear it

The Ryukyu scale is the foundation of Okinawan folk music and runs deep in sanshin songs and eisa dance pieces. Okinawan music uses pentatonic and hexatonic scales rich in half steps, and the half steps Mi–Fa and Ti–Do — especially the move from Ti up to Do (7 to 1) — are a reliable cue for hearing that an Okinawan piece is Okinawan (see Music of Okinawa on Wikipedia). Note that real Okinawan music often adds Re for a six-note version, so the name “Ryukyu scale” does not capture everything.

For composing: an Okinawan mood, fast

When you want an original tune to feel Okinawan, the Ryukyu scale is one of the shortest routes.

• Just decide not to use Re and La in the melody, and an Okinawan flavor appears on its own
• Lean into the half-step moves Mi–Fa and Ti–Do to get that taut, sanshin-like brightness
• If you are stuck, convert a melody you know into the Ryukyu scale and study its skeleton

For listening: hearing what makes it Okinawan

When something feels Okinawan, the cause is usually a half step that is being kept. The opposite of Yona-nuki, which avoids Fa and Ti, the Ryukyu scale pushes the half steps Mi–Fa and Ti–Do to the front. Train your ear on the half-step move from Ti up to Do, and you will start spotting Ryukyu-scale pieces yourself.

What to try next

Hum an Okinawan folk song or pop tune you know and listen for whether it rises by a half step from Ti to Do. If it does, it is very likely the Ryukyu scale. Then play the Ryukyu scale and Yona-nuki (major pentatonic) on the same root in the Scale Dictionary, and hear how much changes from just two different omitted notes. Scales often get their character by subtracting notes, not adding them.

→ Play the Ryukyu scale in the Scale Dictionary