The new leader of Japan's main ruling Liberal Democratic Party has officially announced his executive lineup. LDP President Ishiba Shigeru is set to become prime minister on Tuesday.

Ishiba has named former Prime Minister Suga Yoshihide as the LDP's vice-president.

Aso Taro, who was vice-president, has become the party's top advisor.

Ishiba has appointed Moriyama Hiroshi, the former chairperson of the General Council, as the LDP's secretary-general. Finance Minister Suzuki Shunichi will become the new General Council chairperson.

Former Defense Minister Onodera Itsunori has been appointed chairperson of the Policy Research Council and former Environment Minister Koizumi Shinjiro has become chairperson of the Election Strategy Committee.

Agriculture Minister Sakamoto Tetsushi is the new Diet Affairs Committee chairperson. Former General Council chairperson Fukuda Tatsuo has become the executive acting secretary-general.

Obuchi Yuko, who served as the Election Strategy Committee chairperson, has been appointed the chairperson of the Party Organization and Campaign Headquarters.

Former Digital Minister Hirai Takuya has been retained as the chairperson of the Public Relations Headquarters.

Ishiba said on Monday that as LDP president he believes in the people and will speak the truth with courage and sincerity. He said he will dedicate himself to making Japan a safe and secure country once again, a place where everyone can live with a smile.

Ishiba will form his new cabinet after being elected as Japan's 102nd prime minister in both chambers of the Diet on Tuesday. The lineup of his Cabinet ministers has mostly been decided.

Ishiba will call a snap election for October 27. Official campaigning will begin on October 15.