Table 2. Feature importance (Importance) and p values for features that achieved a feature importance greater than 0.1% in the Japanese RF.

Feature	Importance	p value
/m/	0.78%	0.030
/ɴ/a	0.63%	0.020
/:/b	0.45%	0.049
/g/	0.40%	0.049
/a/	0.39%	0.139
/ɾ/	0.35%	0.089
/Q/c	0.24%	0.059
/ɸ/	0.20%	0.079
/ʈ͡ɕ/	0.19%	0.069
/d͡ʒ/	0.19%	0.129
/d/	0.19%	0.228

^a /ɴ/ represents the coda nasal.

^b /:/ represents the second portion of long vowels.

^c /Q/ represents the initial portion of geminate consonants.