What is the Ab In Sen Scale?
The In Sen scale is a five-note Japanese scale with a distinctively dark, sparse character — defined by its minor 2nd from the root and the wide gaps between its upper tones. It's rooted in traditional Japanese shakuhachi and koto music but has been adopted by modern ambient and experimental guitarists for its stark, meditative quality. Here's how the Ab In Sen Scale lays out on the fretboard. This scale is enharmonically equivalent to G# In Sen.
Notes and Positions
Japanese pentatonic with a dark, suspenseful quality. On guitar, you can treat this as both a lead vocabulary and a way to see chord tones inside common shapes. Start with one box, then connect it to the nearest root on the next string set. In the key of Ab, the notes are: Ab, Bbb, Db, Eb, Gb.
How to Use It
You'll often hear it in Japanese Traditional, Film, and Metal. A good way to internalize the sound is to sing the root, then sing a few scale degrees before you play them.
Practice in small fragments (3-4 notes) and connect them across adjacent positions. Use the interactive fretboard above to spot repeats of the same note on different strings and frets.