The evidence provided by the four sources strongly and consistently supports the statement. All sources are of high or medium-high authority and are in complete agreement on the core facts. The Yomiuri report directly states that "investors linked to the former Murakami Fund" aim to increase their stake in Fuji Media Holdings (Fuji HD). This is corroborated by other sources which provide more specific details. The Bloomberg report identifies activist Aya Nomura, and the news video clarifies she is the daughter of Yoshiaki Murakami, the founder of the original Murakami Fund. Furthermore, the 13D Monitor snippet explicitly connects Yoshiaki Murakami and his current firm to Fuji Media Holdings. This collective evidence firmly establishes the identity of the actor as a firm/group linked to the Murakami Fund. The plan to increase the ownership stake is also consistently reported by all sources, with multiple outlets specifying the target is as high as 33.3%. There are no contradictions in the provided information, and the consistency across multiple credible financial news sources and regulatory trackers makes the statement highly probable.