question: On which video game system were Segaworld and Yokohama-based Joypolis park based?
answer: Sega
context: Title: Virtual Boy
  Passage: The Virtual Boy is a 32-bit table-top video game console developed and manufactured by Nintendo.  Released in 1995, it was marketed as the first console capable of displaying stereoscopic 3D graphics.  Virtual Boy is also the first video game system ever to display in widescreen; it would be 14 years until another system would be widescreen again.  The player uses the console in a manner similar to a head-mounted display, placing their head against the eyepiece to see a red monochrome display.  The games use a parallax effect to create the illusion of depth.  Sales failed to meet targets, and by early 1996, Nintendo ceased distribution and game development, only ever releasing 22 games for the system.
  Title: Joypolis
  Passage: Joypolis ( "Joiporisu") is an amusement park chain that was first opened on July 20, 1994 in Yokohama, Japan.  Joypolis centers have since opened in several cities in Japan and China with the parks featuring arcade games and amusement rides based on Sega intellectual properties.
  Title: Atari Joystick Controller TV Video Game System
  Passage: The Atari Joystick Controller TV Video Game System was made in 2003 (copyright 2002) in Jakks Pacific's Plug It In & Play TV Games plug-n-play game system lineup.
  Title: A Game of Concentration
  Passage: A Game of Concentration (also known simply as Concentration and Hunt & Score) is a video game produced by Atari, Inc. and released in 1978 for its Atari 2600 video game system.  The game was programmed by Jim Huether, and is a video version of the classic memory game.  It was one of a handful of games that used Atari's keypad controllers.
  Title: List of F-Zero media
  Passage: F-Zero is a futuristic racing video game franchise originally created by Nintendo EAD and has been continually published by Nintendo although the company has let outside development houses work on some installments.  The series premiered in Japan on November 21, 1990, with "F-Zero" (エフゼロ ) , which later was released in the North American (August 1991) and PAL (1992) regions.  An original installment has appeared on nearly every succeeding Nintendo video game console and handheld with the exception of the Game Boy Color, Wii, and Nintendo DS.  Excluding Japan, the series usually has landed on a video game system once in its lifetime.  "F-Zero: GP Legend" marks the first time the franchise has hit a gaming system twice in its lifetime in the United States.  Currently the series includes eight released video games, a television series, and video game soundtracks released on audio CDs.  "F-Zero" and "F-Zero X" were re-released for the Virtual Console service through software emulation.
  Title: Sewer Shark
  Passage: Sewer Shark is a first-person rail shooter video game, and is the first on a home console to use full-motion video for its primary gameplay.  It was originally slated to be the flagship product in Hasbro's Control-Vision video game system, which would use VHS tapes as its medium.  However, Hasbro cancelled the Control-Vision platform, and Digital Pictures later developed the game for the Sega CD expansion unit.  "Sewer Shark" is one of the first titles for the Sega CD and one of its best-selling games, leading Sega to eventually bundle it with Sega CD units.  It was later ported and released for the 3DO in 1994.  A port was also planned for the SNES-CD, but that system was cancelled.
  Title: Verne World
  Passage: Verne World (ヴェルヌ・ワールド , Verunu Wārudo ) is a role-playing video game that was released for the Super Famicom exclusively for the Japanese market.  The game revolves around the main character being trapped in a theme park based around the works of Jules Verne such as "A Journey to the Center of the Earth" and "Twenty Thousand Leagues Under the Sea".
  Title: WCW: The Main Event
  Passage: WCW: The Main Event is a professional wrestling video game released in 1994 by FCI for the Nintendo Game Boy portable video game system.  It was the second video game based on World Championship Wrestling (WCW), and the first of two released to a handheld console.
  Title: MTO (video game company)
  Passage: MTO Co., Ltd. (エム・ティー・オー株式会社 ) ("Motorsports Software Technical Office") is a Yokohama-based video game developer and publisher founded in May 1996.  The company is mostly known for the GT series of racing games that it has released ("GT Advance Championship Racing", "GT Pro Series") and the more recent pet games such as Dogz and Catz.
  Title: SegaWorld
  Passage: SegaWorld and Sega Park are names referring to one of a number of theme parks and arcades worldwide, including installations in the United Kingdom, China, Australia and Japan and owned and operated by Sega.  The parks sought to promote Sega games while providing entertainment based on its licenses, while the Japanese Sonictown in a Joypolis park, created an entire world based on Sonic the Hedgehog alone.  Currently, the only SegaWorld arcades that remain open are in Japan, despite most of them becoming unbranded Sega arcades.
citations: SegaWorld Joypolis