Question: What is the main occupation of Hiroshi Sakaguchi, founder of Ki Arts, a traditional Japanese company in Northern California and who features in the 2010 documentary film directed by Tao Ruspoli, based on Martin Heidegger's philosophy?

full_context: Document 1: Kensuke Miyagi: Mr. Miyagi is a fictional karate master played by Japanese-American actor Pat Morita in "The Karate Kid" films. He is referred to as 宮城成義 (which can be translated as either Shigeyoshi or Nariyoshi Miyagi in Hepburn romanization), as written on a pickup name board in the airport scene in "The Karate Kid Part II". However, he is called Keisuke Miyagi (which can be back-translated into a number of Japanese names) at the commendation for Japanese-American soldiers at the start of "The Next Karate Kid". He is known as Miyagi Yakuga in the 1989 animated television series. Mr. Miyagi mentors the characters Daniel LaRusso and Julie Pierce in the films. Morita earned an Academy Award nomination for his performance in the first film.
Document 2: Mark Wrathall: Mark Wrathall (born 1965) is professor of Philosophy at the University of California, Riverside. His main interests include phenomenology, existentialism, the phenomenology of religion, the philosophy of popular culture, and the philosophy of law. He is considered a leading interpreter of the philosophy of Martin Heidegger. Wrathall is featured in Tao Ruspoli's film "Being in the World". According to a recent reviewer of Wrathall's latest book, "Wrathall's writing is clear and comprehensive, ranging across virtually all of Heidegger's collected works... Wrathall's overall interpretation of Heidegger's work is crystal clear, compelling, and relevant."
Document 3: Hiroshi Sakaguchi: Hiroshi Sakaguchi is a Japanese carpenter and the founder of Ki Arts (1985), a traditional Japanese company in Northern California. He is featured in Tao Ruspoli's film Being in the World.
Document 4: Budo: The Art of Killing: Budo: The Art of Killing is an award winning 1978 Japanese martial arts documentary created and produced by Hisao Masuda and financed by The Arthur Davis Company. Considered a cult classic, the film is a compilation of various Japanese martial art demonstrations by several famous Japanese instructors such as Gozo Shioda, Taizaburo Nakamura and Teruo Hayashi. Martial arts featured in the film include: karate, aikido, kendo, sumo, and judo among others. The only modern Japanese martial art not featured in the film is kyudo.
Document 5: Sean Dorrance Kelly: Sean Dorrance Kelly is an American philosopher and professor of philosophy at Harvard University. He is known for his expertise on various aspects of the philosophical, phenomenological, and cognitive neuroscientific nature of human experience. He is featured in Tao Ruspoli's film "Being in the World".
Document 6: Morihiro Saito: Morihiro Saito (斉藤 守弘 "Saitō Morihiro", March 31, 1928–May 13, 2002) was a teacher of the Japanese martial art of aikido, with many students around the world. Saito's practice of aikido spanned 56 years, from the age of 18, when he first met aikido founder Morihei Ueshiba, until his death in 2002.
Document 7: Being in the World: Being in the World is a 2010 documentary film directed by Tao Ruspoli. The film is based on Martin Heidegger's philosophy and is inspired by Hubert Dreyfus. It features a number of prominent philosophers.
Document 8: Hiroshi Isoyama: Hiroshi Isoyama (磯山博 , Isoyama Hiroshi ) is a Japanese teacher of the martial art of aikido. He began training in the Iwama Dojo at the age of 12 as a direct student of the founder of aikido, Morihei Ueshiba in June 1949. He currently holds the rank of 8th dan shihan in the Aikikai and is that organization's Technical Councillor. Isoyama was made the acting head of the Iwama dojo on behalf of Ueshiba Moriteru following the passing of Morihiro Saito. He currently remains as Executive Advisor and senior instructor of that dojo.
Document 9: John Haugeland: John Haugeland ( ; March 13, 1945 – June 23, 2010) was a professor of philosophy, focused on the philosophy of mind, cognitive science, phenomenology, and Heidegger. He spent most of his career at the University of Pittsburgh, followed by the University of Chicago from 1999 until his death. He is featured in Tao Ruspoli's film "Being in the World".
Document 10: Tak Sakaguchi: Tak Sakaguchi (坂口 拓 , Sakaguchi Taku , born March 15, 1975) is a Japanese actor, director, fight choreographer, and stuntman. He is best known for his role in Ryuhei Kitamura's cult film, "Versus". Since his debut, Sakaguchi has worked with Kitamura several times, often appearing alongside fellow Kitamura staple Hideo Sakaki. He has also worked with frequent Kitamura collaborators Yudai Yamaguchi and Yuji Shimomura. Sakaguchi is a talented martial artist, and most often appears in films featuring copious fight scenes, usually performing all of his own stunts. He is purportedly skilled in Bajiquan, Shorinji Kempo, boxing, and kick boxing.
Document 11: Richard M. Capobianco: Richard M. Capobianco is an American philosophy professor and one of the leading commentators on the thought of the 20th century German philosopher Martin Heidegger. His two books, "Engaging Heidegger" and "Heidegger's Way of Being", have led the way to a renewed appreciation of Heidegger's core concern with Being as temporal radiant emergence or manifestation. He has also brought Heidegger into closer proximity with American authors such as Walt Whitman, Henry David Thoreau, Ralph Waldo Emerson, John Muir, and E. E. Cummings, and with English poets such as William Wordsworth and Gerard Manley Hopkins.
Document 12: Human, All Too Human (TV series): Human, All Too Human is a three-part 1999 documentary television series co-produced by the BBC and RM Arts. It follows the lives of three prominent European philosophers: Friedrich Nietzsche, Martin Heidegger and Jean-Paul Sartre. The theme revolves heavily around the school of philosophical thought known as Existentialism, although the term had not been coined at the time of Nietzsche's writing and Heidegger declaimed the label.
Document 13: Harold Sakuishi: Takahiro Sakuishi (Japanese: 作石貴浩 , Hepburn: Sakuishi Takahiro , born March 16, 1969) , better known by his pen name Harold Sakuishi (ハロルド作石 , Harorudo Sakuishi ) , is a Japanese manga artist. Sakuishi has a wide variety of interests which include baseball (he is a huge Chunichi Dragons fan), martial arts, MMA, and music (he is a huge Red Hot Chili Peppers fan). Each of these has become the basis for his most popular series (baseball in "Stopper Busujima", fighting in "Bakaichi", and music in "Beck"). His series also often include character cameos from his past works; one of the newspaper reporters in "Beck" is actually from "Stopper Busujima" and so on. Additionally, he's a big fan of "Sangokushi" ("Romance of the Three Kingdoms") with an altered version of that story appearing in "Beck" written by "Christy Sakuishi". In "Beck" he included many famous people in background crowds. These included many popular musicians, characters from "Happy Sangokushi" and MMA legends Royce Gracie and Kazushi Sakuraba.
Document 14: Yukio Sakaguchi: Yukio Sakaguchi (坂口 征夫 , Sakaguchi Yukio , born July 26, 1973) is a Japanese professional mixed martial artist, professional wrestler, actor and judoka, who is currently signed with DDT Pro-Wrestling and has fought and competed for World Victory Road, DREAM, Pancrase, Pro Wrestling Wave, S-Cup, Shooto, Big Japan Pro Wrestling, Union Pro Wrestling, Kaientai Dojo, Dradition, Legend The Pro-Wrestling and K-1. Sakaguchi is known for his fight with Nigerian K-1 kickboxer, Film actor, and male model Andy Ologun. Yukio is the son of former judoka and professional wrestling legend Seiji Sakaguchi and the older brother of actor Kenji Sakaguchi, who notably co-starred in Ikebukuro West Gate Park when the television show made its debut run in 2000 and most recently in 2012 started making regular appearances on the show Saigo Kara Nibanme no Koi, he also co-starred in the film Face.
Document 15: Richard Polt: Richard F. H. Polt is a professor of philosophy at Xavier University in Cincinnati, Ohio. He has written about and translated works by Martin Heidegger. Polt is a typewriter enthusiast active on the Typosphere and a former editor of the quarterly ETCetera publication about manual typewriters. He is the author of three books, and he recently contributed to the documentary "" that features Tom Hanks.
ground_truth: carpenter