A small, green Japanese citrus from Tokushima, picked unripe — sharper and more aromatic than lime, and squeezed over grilled autumn fish and matsutake.
Japanese grocers in late summer and autumn, fresh or frozen: firm, deep green and glossy. They yellow and lose aroma if left.
Worth knowing
Halve it across and squeeze it over fish just off the grill, or slice it paper-thin into cold soba or a clear soup. Freeze a glut whole; it zests well from frozen.