Nagasawa Masami's Alleged Affair With Tanaka Kei Shocks Japan

On April 23, 2025, the Japanese entertainment industry was thrown into turmoil following allegations of an affair involving popular actress Nagasawa Masami, aged 25, and 40-year-old actor Tanaka Kei. The weekly magazine Weekly Bunshun reported these claims, accompanied by photographs of the two together outside Nagasawa's residence. The images, taken on April 19, show the pair wearing masks as they entered the same vehicle, raising eyebrows and sparking widespread speculation.

Tanaka Kei, who has been married since 2011 and is a father of four, finds himself at the center of this scandal. The age difference of 15 years between him and Nagasawa adds another layer of complexity to the situation. The magazine's report suggested that their relationship is more than just a casual friendship, citing comments Tanaka allegedly made to acquaintances about his private interactions with Nagasawa.

Adding fuel to the fire, Weekly Bunshun hinted that Nagasawa may also be romantically involved with a Korean actor, which further complicates the narrative. This actor has been identified as Kim Mu-joon, who currently stars alongside Nagasawa in the TBS drama Caster. However, Kim Mu-joon's agency, 9ato Entertainment, quickly dismissed these rumors on the same day, stating that "the two are close colleagues," and denying any romantic involvement.

The allegations have sent shockwaves through both the Japanese and Korean entertainment communities. Many fans and observers are expressing disbelief and concern over the implications of such a scandal, particularly given Tanaka's marital status and the potential impact on Nagasawa's flourishing career. As one of Japan's most sought-after actresses, known for her roles in films like Midday Meteor and the Netflix series Mitarai Is Burning, the controversy could have significant repercussions for her public image.

Social media has erupted with reactions to the news, with many questioning why a successful actress like Nagasawa would engage in a relationship with a married man. Comments such as "What does Nagasawa Masami see in Tanaka Kei?" have surfaced, reflecting the public's shock and scrutiny of the situation. The narrative surrounding the affair is further complicated by Tanaka's past controversies, including a scandal where he was caught enjoying nightlife with two female models while his wife was pregnant.

As the story unfolds, the implications of this affair are likely to reverberate throughout both the Japanese and Korean entertainment industries. The potential for negative publicity could affect not only Nagasawa's career but also Tanaka's family life and reputation.

In the meantime, the public is left to wonder about the truth behind these allegations and how they will affect the involved parties. With Nagasawa's rising star in the industry, many are watching closely to see how she navigates this turbulent chapter in her life.