Technologies for Science & Art & Entertainment

Megastar is an accurate simulator for the night sky. It is an educational tool.
Why are we so moved when we look up at the magnificent star-filled skies?
Something really happens in our hearts.
Why do the stars have such power over us?
It seems as if something transcendental is trying to deliver a message to us
through the stars...
Megastar might be the tool to deliver this message!


Company nameOhira Tech Ltd.

General DirectorTakayuki Ohira

Office4489-1, Ikonobecho, Tsuzuki Ward, Yokohama City, Kanagawa Prefecture, 224-0053, Japan



EstablishedFebruary 21, 2005

Capital10,000,000 JPY (as of June, 2016)

BusinessPlanetarium design, manufacturing, and distribution.
Planetarium shows and rental.

Bank of accountMitsui Sumitomo Bank, Ikuta Branch

MembershipInternational Planetarium Society (IPS)
Japan Planetarium Association (JPA)

Major PartnersJAXA (Japan Aerospace Exploration Agency)
Gakken Plus Co.,Ltd.
HoriPro Inc.
Sony PCL Inc., Sony Techno Create Corporation
AstroArts Inc.
Sakado Children’s Center
Sciss AB
Evans & Sutherland
Sky-Skan Europe GmbH
Front Pictures LLC
Planetariums in Japan and all around the world


  • Nov, 1991 Takayuki Ohira developed a lens projection type planetarium "Astroliner", an achievement which was said to be beyond the capabilities of an individual person.
  • Jun, 1998 Astroliner 2 (later renamed to "MEGASTAR") projected more than 1 million stars for the first time in the world. It was announced at the International Planetarium Society Conference in London.
  • Jun, 2003 MEGASTAR-II was first demonstrated at the Tokyu Cultural Center (former Goto Planetarium).
  • Jul, 2004 MEGASTAR-II Cosmos developed jointly with the National Museum of Emerging Science and Innovation (Miraikan).
  • Nov, 2004 MEGASTAR-II Cosmos certified by Guinness World Records as the world's most advanced planetarium projector.
  • Feb, 2005 Established Ohira Tech Ltd.
  • Aug, 2005 The world's first home optical planetarium HOMESTAR released jointly with SEGA TOYS CO., LTD.
  • Sep, 2005 The Science for Adults: Vol.9 "Takayuki Ohira`s ultimate pinhole planetarium" (magazine) was released jointly with Gakken Education Publishing Co., Ltd.
  • Oct, 2006 MEGASTAR-II selected for the "New Japan Style" best 100 (by Ministry of Economy, Trade, and Industry).
  • Jun, 2008 At the International Planetarium Society Conference in Chicago, SUPER MEGASTAR-II shows the world's largest number of 22 million projected stars.
  • Dec, 2008 Developed the world's first LED optical star projector MEGASTAR-IIB for permanent installations in mid-range domes.
  • Dec, 2009 Developed the world's first LED optical star projector MEGASTAR-IIA for permanent installations in large domes.
  • Jul, 2011 MEGASTAR-IIB at Roadside Rest Area FUJIKAWA-RAKUZA certified by Guinness World Records as the world's most advanced planetarium projector.
  • Aug, 2011 Moved to a new large office building.
  • Apr, 2012 Developed a revolutionary new projection concept MEGASTAR-III FUSION that combines optical and digital projections.
  • Jun, 2013 Developed the world's first optical & digital compact planetarium MEGASTAR-Jr.
  • Aug, 2014 The world's highest resolution 12K MEGASTAR-FUSION demonstrated at the Chiba Museum of Science and Industry.
  • Oct, 2015 Jointly with Sony DADC Japan Inc. developed the super precision star plate GIGAMASK capable of projecting the largest number of stars in the world (more than one billion stars).
  • Mar, 2016 Developed full dome personal ultra-small planetarium projector MEGASTAR CLASS.


JR Yokohama Line, Kamoi station, 7 minutes walking distance from the station.
Go down the stairs of the north exit of the station, cross the bridge and go down the stairs in front of it. You'll see the dentist and the small park on the right side. Turn right along the park, pass the Chinese restaurant and turn left at the corner of the red mailbox. Ohira Tech's office is behind of the apartment just before the automobile maintenance shop on your left.