On March 3, Hiroshi Nakatsuka, the Secretary-General of the Japan Innovation Party, held a press conference to explain that some videos were mistakenly distributed as advertisements during the House of Representatives election and apologized for the error. The media had raised concerns that this could violate the Public Offices Election Law, which prohibits paid internet advertising related to election campaigns. In response to these allegations, Nakatsuka confirmed that he reported the matter to the Osaka Prefectural Police.

According to Nakatsuka, during the campaign period starting January 27, the party's main office had posted videos on YouTube showing speeches by key officials, including the party leader Hirofumi Yoshimura, as paid internet ads. After being informed by media outlets on February 26 that this could have legal implications, the party reported the issue to the police the following day. The Public Offices Election Law strictly bans election campaign-related paid internet ads by candidates and parties, imposing penalties up to two years of imprisonment or fines up to 500,000 yen for violations.

While the law does not prohibit political parties from running paid ads for 'political activities', Nakatsuka did not disclose the specifics of the videos or the parts of the law that may have been violated, stating that they are currently consulting with the police. He acknowledged the party's oversight in verifying the promotional content before publication and emphasized their commitment to cooperating fully with the authorities in the investigation.