Title: Skyhigh (manga)
Content:  Skyhigh (スカイハイ) is a Japanese manga which spawned a popular live-action TV drama, starring Yumiko Shaku, and 2003 theatrical release starring the same actress in a big budget prequel to the TV series. The manga was written by Japanese manga author Tsutomu Takahashi. Published in December 2001, the 240 page graphic novel follows the story of Izuko, a beautiful and mysterious "Guardian of the Gate" to the Afterlife. Izuku guides troubled souls who pass through, presenting them with three choices: to ascend to Heaven to await reincarnation; to deny their death and wander the earth as a ghost, or to seek vengeance upon the person who caused their death or suffering—but the consequences of that, no matter how justified, is to be condemned to Hell. Sequels include Skyhigh: Karma' (スカイハイ カルマ) and Skyhigh: Shinshō (スカイハイ 新章). Both sequels were published while the series was in production and at the height of its popularity.
Title: Sky High (1986 film)
Content:  Sky High is a 1986 American adventure and comedy film directed and produced by Nico Mastorakis, and starring Daniel Hirsch, Clayton Norcross, Frank Schultz, Yvette Jarvis and John Lawrence. The film has music composed by Dennis Haines.
Title: Sky High (1951 film)
Content:  Sky High is a 1951 American comedy film directed by Sam Newfield and starring Sid Melton, Mara Lynn, Sam Flint, Douglas Evans and Fritz Feld. The film has music composed by Bert Shefter.
Title: Sky High!
Content:  Sky High! is the fourth studio album by American soul/R&B group Tavares, released in 1976 on the Capitol label.
Title: Sky High (2020 film)
Content:  Sky High (Hasta el cielo) is a 2020 Spanish crime thriller film directed by Daniel Calparsoro, starring Miguel Herrán, Luis Tosar, Carolina Yuste, Patricia Vico, Fernando Cayo, Richard Holmes, Asia Ortega, Ayax Pedrosa and Dollar Selmouni.
Title: Sky High (TV series)
Content:  Sky High (スカイハイ) (also known as Skyhigh) is a live-action, supernatural Japanese television drama series, starring actress and model, Yumiko Shaku. It aired in Japan, first run, from 2003 to 2004, and was popular enough to spawn the 2003 feature film of the same name (produced while the series was still in production and starring the same actress). Both are based on the Japanese manga, Skyhigh. Shaku stars as Izuko, the Guardian of the Gate to the afterlife. The basic premise of the television series is somewhat similar in concept to the American series, Ghost Whisperer, in which the protagonist must use her powers to guide the dead on their journey to the afterlife by helping them determine the meaning or circumstance of their death. However, in Izuko's case, no matter how hard she tries, her guidance does not always result in a happy ending.
Title: Sky High (2003 film)
Content:  production company. The movie was helmed by popular action director Ryuhei Kitamura, best known for his Versus series of films, as well as other popular draws such as Azumi and Godzilla: Final Wars. Kitamura also directed several episodes of the TV series, and following the film's box office success, Sky High 2 (or Season 2) was quickly put into production by the network for January 2004, utilizing many elements from the film, including its darker, edgier look, and improved sets and effects. The film's screenplay was written by Isao Kiriyama, based on the manga Sky High by Tsutomu Takahashi. The closing theme for the movie is "Horizon" by Hyde (L'Arc-en-Ciel and Vamps).
Title: Sky High (2003 film)
Content:  Sky High (スカイハイ) is a Japanese supernatural action film from director Ryuhei Kitamura. It is based on the manga of the same title by Tsutomu Takahashi and serves as a prequel to a Japanese television drama of the same name, and starring the same actress, Yumiko Shaku. Although the film is a prequel to the series, the film was made while the series was still in production, sometime between the first and second seasons. The film had a clear effect on the direction of the second season, as evidenced in the look and style of Mina/Izuko's second season costuming—more similar to the darker, edgier look she sports in the film, as opposed to the softer, colourful, kimono-like outfit of the first season. The film reveals how the somewhat meek Mina became the heroic Izuko, as seen in the series (and the film’s action climax).
Title: Sky High (song)
Content:  "Sky High" is a song by British band Jigsaw. It was released as a single in 1975 and was the main title theme to the film The Man from Hong Kong. The song was a worldwide hit in the latter part of 1975, reaching No. 3 on the Billboard Hot 100 and No. 4 on the Adult Contemporary chart in the United States. It was composed by Clive Scott and Des Dyer of Jigsaw. The orchestral arrangement was by Richard Hewson. It was also a top 10 single on the UK Singles Chart. The 1975 Australian single was released under the name "British Jigsaw" due to an 
Title: Sky High (2005 film)
Content:  Sky High is a 2005 American superhero comedy film directed by Mike Mitchell and written by Paul Hernandez and Kim Possible creators Robert Schooley and Mark McCorkle. The film stars Michael Angarano, Danielle Panabaker, Mary Elizabeth Winstead, Kelly Preston and Kurt Russell. It also features Bruce Campbell, Cloris Leachman, Jim Rash, Steven Strait, Lynda Carter, Dave Foley and Kevin McDonald. It tells the story of Will Stronghold, the son of two superheroes who is enrolled in an airborne high school for teenage superheroes, where his powers kick in; he must deal with a growing distance from his old friends, a threat from mysterious supervillain and get the girl of his dreams. The film was released to theaters on July 29, 2005, and grossed 89.4 million worldwide on a 35 million budget. It received generally favorable reviews from critics.

Question: Who is the author of Skyhigh?
Answer: Tsutomu Takahashi.