Prime Minister Shinzo Abe envisions replacing more than half of his 18 ministers in a Cabinet reshuffle expected in early September, ruling coalition officials said Sunday.

Abe plans to retain key Cabinet members including Finance Minister and Deputy Prime Minister Taro Aso and Chief Cabinet Secretary Yoshihide Suga as well as Akira Amari, minister in charge of the ongoing Trans-Pacific Partnership negotiations, while keeping one Cabinet position for his Liberal Democratic Party's coalition ally New Komeito party, they said.

Abe is expected to appoint many new ministers in the upcoming shake-up of his current Cabinet, formed in December 2012, partly to satisfy LDP colleagues with ambitions to serve in the Cabinet for the first time, they said.

Abe will also consider reshuffling senior posts within the LDP as the terms of current party executives are due to expire in September, they said.