Senyo Kogyo is a Japanese entertainment company specializing in the production and operation of amusement park equipment. The company is known for manufacturing Ferris wheels.

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• Cosmo Clock 21: 107.5 m (353 ft) tall, completed 1989; world's tallest 1989 to 1997;^[1] 112.5 m (369 ft) tall when re-erected in 1999^[2]
• Diamond and Flower Ferris Wheel: 117 m (384 ft) tall, world's second tallest when completed in 2001^[3]
• Tempozan Ferris Wheel: 112.5 m (369 ft) tall, completed 1997; world's tallest 1997 to 1999^[1]