Hirosue Ryoko and Sato Takeru are said to be having an affair according to the 27th February issue of "Josei Seven". The magazine reported that Hirosue was caught leaving her apartment at 8.30pm on 21st February while dressed in fishnet stockings and 12cm-high stiletto heels and was carrying a big paper bag in her right hand which the reporters speculated could be a late Valentine's Day present. After a 15-minute taxi ride, Hirosue arrived at Sato's apartment and used the intercom to inform him of her arrival. Soon after, the lobby was unlocked and she headed into the apartment building. 9 hours later at 5.20am, a taxi pulled up at the entrance of Sato's apartment building and 15 minutes later, Sato's agency car also arrived at the same venue. Sato was seen boarding his agency's car in a big hurry and believed to be heading to his work venue. Soon after, Hirosue also left the apartment block from the back door and boarded the taxi which had been waiting for more than 20 minutes. The article also mentioned how the two were previously seen at a volcanic lava spa in Tokyo at the end of January.
When asked about the nature of Hirosue and Sato's relationship, both agencies denied that they were having an affair and Sato's agency also commented that she was just a respected senior of his.
Hirosue was previously married to model Okazawa Takahiro before they divorced in 2008 and had remarried candle article Candle Jun in 2010. She has two sons from her two marriages. Hirosue and Sato met on the set of 2010 NHK Taiga drama "Ryomaden".
According to the magazine, Hirosue's husband was not in Tokyo on the night she visited Sato because he has been away in disaster-struck areas like Fukushima and Niigata since mid February. In fact, Hirosue was said to have been unhappy about her husband's continued absence from home due to his charity work even though their relationship was believed to be on good terms. Due to the fact that Candle Jun was not at home most of the time, Hirosue was reported to have complained to her friends that she felt lonely and even suspected why her husband kept going to those areas and if he had someone there who he wanted to meet.
Hirosue and Sato did not have many scenes together in "Ryomaden" thus did not get close during the filming. However, things changed when they were seen chatting happily during the wrap-up party of the drama. Even after the drama ended, some of the cast members would gather for drinks from time to time and it was said that they met up again during one of these sessions.