Question: What was the real name of Daimaou Kosaka, the man whose single reached 1 on the "Billboard" Japan Hot 100 chart?

full_context: Document 1: Osamu Akimoto: Osamu Akimoto (Japanese: 秋本 治 , Hepburn: Akimoto Osamu ) is a Japanese manga artist born on December 11, 1952 in Katsushika, Tokyo. He is best known for his long-running comedy series "Kochira Katsushika-ku Kameari Kōen-mae Hashutsujo", which was continuously published in "Weekly Shonen Jump" for 40 years from 1976 to 2016. With 1,960 chapters collected into 200 "tankōbon" volumes, it is the manga series with the highest number of volumes, being awarded a Guinness World Record for "Most volumes published for a single manga series." By February 2012, the series had sold over 155 million copies, making it one of the best-selling manga series in history. Akimoto debuted with "Kochikame" under the pen name of in 1976. He changed to using his real name in 1978, after the series reached its 100th chapter.
Document 2: Panda (song): "Panda" is the debut single by American rapper Desiigner. The song premiered on December 15, 2015 and was released for digital download on the iTunes Store as a single, before being re-released on February 22, 2016. The song was written by Desiigner and his producer Menace. "Panda" was heavily sampled by Desiigner's fellow GOOD Music label-mate and founder Kanye West, for "Pt. 2", a song on West's seventh studio album "The Life of Pablo", and inspired a number of remixes. The single topped the US "Billboard" Hot 100 at the end of April 2016. A music video was released on May 10, 2016. It was nominated for best hip hop video at the 2016 MTV Video Music Awards.
Document 3: Gangnam Style: "Gangnam Style" (Korean: 강남스타일 , ] ) is the 18th K-pop single by the South Korean musician Psy. The song was released on July 15, 2012, as the lead single of his sixth studio album "Psy 6 (Six Rules), Part 1", and debuted at number one on South Korea's Gaon Chart. On December 21, 2012, "Gangnam Style" became the first YouTube video to reach one billion and two billion views. The song's music video has been viewed over 2.9 billion times on YouTube, and was the most viewed video on YouTube from November 24, 2012, when it surpassed the music video for "Baby" by Justin Bieber featuring Ludacris, to July 10, 2017, when it was surpassed by the music video for "See You Again" by Wiz Khalifa featuring Charlie Puth.
Document 4: Aka Plu: Yuko Matsuoka (松丘 夕子 , Matsuoka Yūko ) , better known as Aka Plu (赤 プル , Aka Puru ) , is a Japanese comedian who is represented by the talent agency, Ohta Production. Her old stage name was Akai Plutonium (赤い プルトニウム , Akai Purutoniumu ) . Her husband is Shingo Matsuoka which they were a comedy duo called Aka Plu to Danna (which renamed to Chime in March 2015).
Document 5: Hironobu Kageyama: Hironobu Kageyama (影山 ヒロノブ , Kageyama Hironobu ) is a Japanese musical artist prominent in the soundtracks for anime, video game, and tokusatsu productions. He is sometimes called Kami (Kei) by his fans. Kageyama got his big break at age 16, as lead singer of the rock group Lazy. By the early '80s, the band split and Kageyama went solo. He found major success once he started to sing the theme songs of anime and tokusatsu shows. Becoming immensely popular soon after, Kageyama went on to be dubbed the "Prince of Anime/Tokusatsu Songs" and is a main fixture for shows to this day. He also got the nickname "Mr. DBZ" by fans of "Dragon Ball Z" as he did the most songs for that anime. He is an original member and the current leader of the popular vocal group JAM Project. Also, along with Masaaki Endoh, he hosts "Anipara Ongakukan", a TV show aired on the Kids Station Channel that shows live performances of the theme songs of recent anime and tokusatsu shows.
Document 6: List of MYX Number-One Music Videos 2014: MYX is the only music channel in the Philippines that shows different music videos, domestically and internationally. Every week, its MYX Hit Chart presents the Top 20 favorite music videos voted by People's choice. In 2014, Taylor Swift's Shake It Off spent the longest week for any music video with a total of 10 weeks and later became the chart's year-end special Top 1. The year is also lucky for Western boy bands such as One Direction, 5 Seconds of Summer and The Vamps as their released music videos were all chart-toppers. Philippine Acts including Sarah Geronimo, Gloc-9, Kyla, and more also dominated the chart with most weeks.
Document 7: PPAP (Pen-Pineapple-Apple-Pen): "PPAP (Pen-Pineapple-Apple-Pen)" (Japanese: ペンパイナッポーアッポーペン , Hepburn: Penpainappōappōpen ) is a single by Pikotaro, a fictional singer-songwriter created and portrayed by Japanese comedian Daimaou Kosaka. It was released as a music video on YouTube on 25 August 2016, and has since become a viral video. s of 2017 , the official video has been viewed over 122 million times, spawned parodies, and has been hailed as the new "Gangnam Style" by various newspapers and online media. The single itself reached number 1 on the "Billboard" Japan Hot 100 chart and became the shortest single to chart on the "Billboard" Hot 100. At the end of 2016, the songs charted at number 6 on Japan Hot 100 Year-end Chart.
Document 8: Pleaseeasaur: Pleaseeasaur (pronounced Please-ee-uh-saur) is an American comedic musical act made of JP Hasson (formerly in We’re Not From Idaho and Touch Me Zoo, both with Joe Genaro of The Dead Milkmen). The music is high energy camp style humor. The live performance usually includes Hasson in many costumes, each of which coincides with the song, along with multimedia animations of related images on a large screen. Many songs are commercials for fake companies such as "No Prob Limo", "Pizza Brothers and Sons, Inc." and "Action City News."
Document 9: Onision: Gregory Jackson (born November 11, 1985), known by his YouTube username Onision ( ), is an American YouTuber and Internet personality. While his channel "Onision" is mainly satirical, videos on his other channels revolve around life stories, topics concerning suicide and self-harm, body issues, and answering questions he receives on his forum. Consequently, he has been cited as "the most controversial YouTuber," and "YouTube's most troubled star." He also created the "Banana Song (I'm A Banana)", which has amassed over 58 million views, and over 710,000 likes.
Document 10: Gwiyomi: The Gwiyomi Song, or Kwiyomi Song (귀요미 송), is a K-pop single by South Korean singer Hari and was released on February 18, 2013. It was inspired by a gesture from South Korean rapper Jung Ilhoon of boy group BtoB. The gesture is called 'Gwiyomi Player', that was popularized by South Korean variety show "Weekly Idol" through a segment called "The Aegyo Battle" (Battle of Cuteness) following Ilhoon's guest appearance on the show in October 2012. The song went on to be a viral success and an Internet meme after Korean Media outlet "Sports Seoul" uploaded a clip of Hari performing the gestures and singing the song. This video has since inspired many Asian netizens to upload their own versions onto the internet.
Document 11: Kazuo Uzuki: Kazuo Uzuki is the subject of a baseball card issued by Topps as an April Fools' Day hoax. The card was released on February 6, 2008 of a supposed high school superstar named Kazuo "The Uzi" Uzuki. In Japanese, Kazuo Uzuki means "the first son of April." The person actually depicted on the card was a New York University law student named Sensen Lin.
Document 12: Poppy (singer): Poppy, also known as That Poppy, is an American singer, songwriter, ambient music composer and YouTube personality. She moved to Los Angeles in 2014 to pursue a musical career, where she signed with Island Records and released her debut EP, "Bubblebath" (2016). In late 2016, she became the face of Sanrio's "Hello Sanrio" collection.
Document 13: Daimaou Kosaka: Kazuhito Kosaka (Japanese: 古坂和仁 , Hepburn: Kosaka Kazuhito , born 17 July 1973) , better known by his stage names Daimaou Kosaka (古坂大魔王 , Kosaka Daimaō ) and Pikotaro (ピコ太郎 , Pikotarō , born 17 July 1963) , is a Japanese comedian. Kosaka insists that Pikotaro is another person promoted by him, but they are considered the same person. He is best known for his single "PPAP (Pen-Pineapple-Apple-Pen)".
Document 14: Kannazuki (comedian): Satoshi Okumura (奥村 聡司 , Okumura Satoshi , born 3 November 1965) , better known by his stage name Kannazuki (神奈月 ) , is a Japanese comedian who specialises in impersonations of sportspeople.
Document 15: Bakarhythm: Hidetomo Masuno (升野 英知 , Masuno Hidetomo , born November 28, 1975, in Tagawa, Fukuoka Prefecture, Japan) , better known for his stage name Bakarhythm (バカリズム , Bakarizumu ) , is a Japanese comedian, narrator, actor, playwright, and lyricist who is represented by the talent agency Maseki Geinosha. He is sometimes called Bakarhythm Masuno (バカリズム 升野 , Bakarizumu Masuno ) .
ground_truth: Kazuhito Kosaka