本因坊 ほんいんぼう せんではありませんでした
hon'in bōsendewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 本因坊戦

1. Was not a game against Honinbo.; Was not the Honinbo match.

Past/Perfective
Negative
Polite
Formal Register