TOKYO >> The Unification Church, whose close ties with Japan’s governing party have emerged after the assassination of former Prime Minister Shinzo Abe, acknowledged Thursday that it had accepted “excessive” donations from the suspect’s mother, and that it would need to consider it seriously if that led to the killing.

Abe was shot to death during an outdoor campaign speech in July. The suspect, Tetsuya Yamagami, told police he killed Abe because of his apparent link to a religious group he hated. A letter and social media postings attributed to him said his mother’s large donations to the church bankrupted his family and ruined his life.

Hideyuki Teshigawara, a senior official at the church, which is now called the Family Federation for World Peace and Unification, said at a news conference that he was “deeply saddened” to hear Yamagami had told police that his anger toward the church led to the attack.

Teshigawara said he is leading reforms in the church to ensure its recruitment and donations are not forced or harmful to followers or their families.

The church has acknowledged that Yamagami’s mother donated more than 100 million yen ($700,000), including life insurance and real estate, to the group. It said it later returned about half at the request of the suspect’s uncle.

A church lawyer, Nobuya Fukumoto, said he considers the donations by Yamagami’s mother “excessive,” and that “we have to take it seriously if that tormented (the suspect) and led to the outcome.”

The police investigation of Abe’s killing led to revelations of widespread ties between the governing Liberal Democratic Party, including Abe, and the South Korea-based church over their shared interests in conservative causes.

An LDP survey found nearly half of its lawmakers had ties to the church. Current Prime Minister Fumio Kishida has pledged to cut all such ties, but many Japanese want a further explanation of how the church may have influenced party policies.

Kishida has come under fire over his handling of the church controversy as well as for pushing plans for a state funeral for Abe, and support ratings for his government have nosedived. Abe is one of Japan’s most divisive leaders, and plans for the state funeral next Tuesday have become increasingly unpopular as more details have emerged about the party’s and Abe’s links to the church.

On Wednesday, a man set himself on fire near the prime minister’s office in an apparent protest against the state funeral. The man suffered serious burns but was conscious when taken to a hospital. Police said it was an attempted suicide and refused to provide further details. Media reports said he had a note expressing his opposition to the state funeral.

The attempted suicide amid heightened security was an embarrassment for police, who have already been accused of providing insufficient protection for Abe.

State funerals for prime ministers are rare in Japan. Kishida has said Abe deserves the honor as Japan’s longest-serving post-World War II leader and for his diplomatic and economic achievements.

Critics say the plan for a state funeral was decided undemocratically, has no legal basis, and is an inappropriate and costly use of taxpayers’ money. Political analysts say Kishida decided to hold a state funeral to please Abe’s party faction and buttress his own power.

An executive of the main opposition Constitutional Democratic Party, Katsuya Okada, told a group of reporters Thursday that there are many problems with holding a state funeral and that party executives will boycott the event.

“The most unfortunate thing is that the state funeral is carried out despite the majority of the people being opposed to it, which I think is also unfortunate for former Prime Minister Abe,” Okada said. “Prime Minister Kishida should have made a decision more carefully.”