ワン
wangiri

Noun
Suru Verb

1. one-ring hang-up call (to receive a call back, oft. for scams); missed call for exchanging phone numbers; wangiri

悪質 あくしつ迷惑 めいわく電話 でんわ、ワンギリにご注意 ちゅうい!!
akushitsuna mēwaku denwa wangirini gochūi!!
Beware of 'One Ring' malicious nuisance calls!!