noun
three kongs; winning hand with three kongs
A mahjong yaku: a hand that contains three kongs (槓子).
from Chinese sān gàng zi
三槓子は珍しい役の一つだ。
Three kongs is one of the rare yaku.
彼は三槓子を完成させて逆転した。
He completed a three-kong hand and turned the game around.
From Chinese 三槓子 (sān gàng zi), literally 'three kong pieces'. The reading サンカンツ is a Sino-Japanese on'yomi adaptation.