Around 13,000 people, including some opposition MPs have marched through the rain in Tokyo.
The protesters want plans for Japan’s former Prime Minister, Shinzo Abe’s funeral to be scraped because of his links to the Unification Church and the use of taxpayer’s money.
Abe was gunned down at a public campaign event in July, with the suspected perpetrator telling investigators his life was ruined because of donations to the religious movement.
The funeral is expected to cost 1.65 billion yen with costs sky-rocketing because of the extra security needed.
Japanese polling shows 56 per cent of respondents were opposed to the plan, which is an increase from the month prior.
The state funeral will take place at the Nippon Budokan in Tokyo, with thousands of attendees and delegates from around the world expected to attend.
Japanese Prime Minister Fumio Kishida has confirmed U.S. Vice President Kamala Harris, Indian Prime Minister Narendra Modi and Australian Prime Minister Anthony Albanese will be in attendance.
The funeral is set to take place on 27 September.
