門前 もんぜん きよし自摸 つも じゃないです
monzen kiyoshitsumowajanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 門前清自摸和

1. It's not a clean win by self-draw.; It's not a straightforward win.

Negative
Polite
Casual Register
Mahjong