Lawmakers from the ruling Liberal Democratic Party headed by Prime Minister Shinzo Abe argued on Thursday for amendments to the Constitution as the Diet resumed debate on the issue for the first time in two years.

At the session, a cross-party group reported details of a September fact-finding trip to Germany, Ukraine, Lithuania and Estonia, where members studied constitutional and referendum systems.

Eisuke Mori, head of the cross-party group and an LDP member, said Germany has revised its constitution, or Basic Law, 63 times — including this year — since World War II.