Scales of the World
Here’s a scale known simply as the 4 tone scale. You can find more four tone scales and their names in the master scale chart.
Some may look at this as a Phrygian arpeggio.
This scale most closely resembles the Kokin Joshi scale and has a similar open, simple beauty.
This is another in the list of Asian scales like the Ritusen, the Kumoi and the Hira Joshi that you can tap into for an exotic Japanese pentatonic feel.