Question: The AV Idol named Chihiro Hasegawa is most commonly associated with which industry?

Context paragraphs:
Hitomi Kobayashi: Hitomi Kobayashi (Japanese: 小林ひとみ , Hepburn: Kobayashi Hitomi ) is an important early Japanese AV idol.  One of the founding figures of the Japanese adult video, she has been called indispensable to any discussion of the AV. " Mainichi Shimbun" calls her "one of the icons of Japanese adult cinema history."  Her unprecedented popularity in the mid-1980s, the early days of the Japanese AV, earned her the title "Queen of AV."  According to an adult entertainment reporter for "Shukan Shincho", "She laid the foundations for the golden age of adult video."

Maiko Yūki: Maiko Yūki (Japanese: 夕樹舞子 , Hepburn: Yūki Maiko , born January 30, 1977) is a Japanese AV idol, actress and stripper.  She was one of the top AV idols in the mid-1990s and was named the "AV Girl of the Year" in 1998, but her career in adult videos spanned more than 15 years.

Yuri Komuro: Yuri Komuro (Japanese: 小室友里 , Hepburn: Komuro Yuri ) (born July 28, 1976 in Kanagawa Prefecture, Japan) is a Japanese actress, author and former AV idol.  She was one of the top actresses in the AV field during the late 1990s and in her dominant period from 1996 to 1999 was called "The AV Queen".

Chihiro Hasegawa: Chihiro Hasegawa (Japanese: 長谷川ちひろ , Hepburn: Hasegawa Chihiro ) (born September 23, 1984), also known as Nami Funakura (船倉奈美), is a Japanese former AV idol who starred in more than 200 adult videos from various labels.

List of Sankarea: Undying Love episodes: "" is a 2012 anime television series produced by Studio Deen.  The series has been based on the manga series by Mitsuru Hattori.  The story follows a boy named Chihiro Furuya and his relationship with Rea Sanka, a girl who dies and comes back to life as a zombie due to a resurrection potion Chihiro had made.  The 13-episode television series aired in Japan between April 5 and June 28, 2012.  Three additional original video animation episodes were released.  Episodes 00 and 14 were bundled with the limited editions of the 6th and 7th volumes of the manga respectively, which were published on June 8 and November 9, 2012.  Episode 13 was released with the anime series' 6th Blu-ray Disc and DVD volumes on November 30, 2012.

Hikaru Hoshino: Hikaru Hoshino (Japanese: 星野ひかる , Hepburn: Hoshino Hikaru ) is a Japanese former AV Idol.  Japanese adult video (AV) columnist Kemuta Ōtsubo characterized her as one of the stars of the 1986-1990 period in the Japanese AV scene.

AV idol: An AV idol (adult video idol; AV actress (AV女優 , Ēbui joyū ) ) is a Japanese idol who works in the pornographic business, often both as an actress as well as a model as the video performances have a wide range, from just the idol strolling around their house doing chores in bikinis to hardcore porn.  Since the dawn of the AV industry in the early 1980s, hundreds of AV idols have debuted every year, with an average career span of about a year, appearing in five or ten videos during that time.  Notable AV idols have careers spanning several years, have a high general public recognition, or make a significant impact on the industry in some other manner.

Rin Aoki: Rin Aoki (Japanese: 青木りん , Hepburn: Aoki Rin ) born February 28, 1985 is a Japanese gravure model, AV idol and erotic dancer.  She began as a gravure idol and later moved to hardcore video work where she became an award-winning AV idol.

Tina Yuzuki: Tina Yuzuki (Japanese: 柚木ティナ , Hepburn: Yuzuki Tina ) , also known as Rio, is a Japanese actress, singer and former AV idol who debuted as an AV actress in 2005, appearing in videos produced by the Max-A and S1 studios.  After starring in AVs in various genres during her first year in the industry, she won an industry award as Best New Actress for 2006.  Since late 2007, she has used the stage name of Rio.  She officially announced her retirement in January 2016.

Rui Sakuragi: Rui Sakuragi (Japanese: 桜樹ルイ , Hepburn: Sakuragi Rui ) , is a former Japanese AV Idol, gravure idol and erotic dancer who has been described as a "real AV Queen", the "top Japanese AV idol of the mid-1990s" and the "biggest star" in AV in 1992.  She has also appeared widely in mainstream films and videos and on TV.

Supporting paragraphs: Chihiro Hasegawa AV idol
Answer: pornographic