Sakiroo (Korean: 사키루), born Choi Sang-hyun (Korean: 최상현; Hanja: 崔相賢), is a South Korean illustrator and character designer. The subjects for his work are varied and include caricatures of sports figures. He has been involved in exhibits and projects (see below), including those in South Korea, France, England, United Arab Emirates, China, Singapore, United States, Mexico, Colombia, and Venezuela. He lives and works in Bucheon, just outside Seoul.

He was invited in Global Artist Committee of Asian Art Association in January 2023.

His work has been described as "a multitude of illustrations and cartoons full of color and extravagance," "inspired by cartoons and manga," influenced by "Asian themes," and combining "hand-drawn illustrations with digital coloring — using his own color theory." In an interview with KOCCA he said he mainly works on paper, which allows him to sketch in coffee shops in Seoul, without computer graphics. Manga that have influenced him include Yusuke Murata's Eyeshield 21, and Akira Toriyama's Dr. Slump and Dragon Ball. Dragon Ball's second anime adaptation, Dragon Ball Z, was also an influence.

His work, though varied, sticks closely to popular culture themes, often making fun of them. In 2011, his "Yellow Lemon" characters, with "oblong heads, menacing grins, beady eyes and dental work from the '90's" populated a "school" with uniformed elite characters, including Batman, Superman, Ronald McDonald, Homer Simpson and Michael Jackson. After he used the characters again to "pick on" famous fashion brands, Hugo Boss, Ermenegildo Zegna, Burberry, Lacoste and The North Face; Trendhunter.com said "Yellow Lemon" was becoming a cultural staple itself.

In 2013, both Mass Appeal and Flavorwire, that document urban and cultural trends, noted his caricature work with Colombian artist Pol (Jean Paul Egred), "some of music’s best collabs", among those, MJ and Eddie Van Halen, Run–D.M.C. and Aerosmith, enhanced with beaks, braces and severed limbs. He had previously joined Pol in 2012, with other South Korean and Colombian artists, when they met in Miami to show an interpretation of each other's pop icons.

In 2013, he illustrated The Big Bang Theory for Warner Bros. Television; and the Striding Man for Johnnie Walker, and in 2014, Valderrama for Major League Soccer Insider.

In 2016, he spoke about his soccer illustrations on SBS TV's Football Magazine Goal! and continued educational talks with other young artists. His June 2016 autobiography, Sakiroo Breaking, details his path to becoming an artist. Kim Byung-joon of E-Daily News said, "The depth of the message is deep because it crosses over material such as philosophy, history, culture, art, and education."

2006: Interview and live drawing illustration for a singer’s album, Mnet TV, Seoul, South Korea
2011: NOW magazine cover, Maracaibo, Venezuela
2011: "8 Players Illustrations" for ESPN The Magazine, United States
2012: Wall painting, Korean and Colombian artist's group, Wynwood, Florida
2012: Sakiroo X Jean Paul Egred, Duo Musician Illustration, "Rock It", Wynwood, Florida and Bogota, Colombia
2012: Dot objects design for Jellyfish Entertainment VIXX 2nd M/V & Album, Seoul, South Korea
2013: Design competition judge, "Cut & Paste: Characterized Seoul 2013", Seoul, South Korea
2013: Speaker, Design class, The College of Architecture, Art, and Design at Mississippi State University. Mississippi State University, Starkville, Mississippi
2013: Speaker 2013 Illustrators Deathmatch, Querétaro Mexico
2013: Concept illustration for VIP lounge large mural, Diageo's Seoul Johnnie Walker House, England
2014: "Carlos "El Pibe" Valderrama" Futbol Artist Network, featured Major League Soccer "MLS Insider series", United States
2014: "Referee", Grand Prix winner (Al Sabeh Cement), "I Fell From a Unicorn", Bronze winner (Band-aid), for Impact BBDO Dubai, Dubai Lynx International Advertising Festival, Dubai, United Arab Emirates
2014: Speaker, Create Now 2014 - 대한민국, Adobe Creative Cloud, Seoul, South Korea
2015: Banner illustration, tutorial, Adobe Dreamweaver CC, United States
2015: Playing Art Edition Two, "Seven of Diamonds", Digital Abstracts Magazine, Spain
2015: Speaker, TedxYouth, Korean Minjok Leadership Academy, Hoengseong-gun, South Korea
2016: Speaker, AAD International Design Exchange Seminar and Vision Get Wild 2015, Kaohsiung Exhibition Center, Kaohsiung, Taiwan