B Kumoi Scale

What is the B Kumoi Scale?

The Kumoi scale is a Japanese pentatonic scale with a delicate, contemplative sound that originates from koto music of the Edo period. Its gentle blend of minor 2nd and major intervals creates a wistful, introspective mood that works beautifully for clean-tone passages, ambient textures, and any time you want an Eastern-tinged melodic voice. Here's how the B Kumoi Scale lays out on the fretboard.

Notes and Positions

Japanese pentatonic with a bittersweet minor quality. On bass, this scale becomes a toolkit for strong roots, passing tones, and melodic fills that still support the groove. Think in root-on-E and root-on-A boxes, then adapt the same notes for 5-string bass when the low B string gives you another root below the pattern. In the key of B, the notes are: B, C#, D, F#, G#.

How to Use It

You'll often hear it in Japanese Traditional, Ambient, and Jazz. A good way to internalize the sound is to sing the root, then sing a few scale degrees before you play them.

Build two-bar bass lines that return to the root before experimenting with wider melodic movement. Use the interactive fretboard above to spot repeats of the same note on different strings and frets.