leading opposition party; largest opposition party
Refers to the opposition party with the most seats in a legislature; used in political contexts.
The leading opposition party is aiming for a change of government in the next election.
In the Diet, the largest opposition party opposed the budget bill.
与党 means 'ruling party' or 'governing party', while 野党第一党 is the largest party not in power.
野党 is a general term for 'opposition party'; 野党第一党 specifies the largest among them.
Standard kanji spelling using 第一.
Variant using numeral １; common in newspapers and headlines.
Compound of 野党 (opposition party) + 第一 (first) + 党 (party).