Big X makes a cameo appearance in the Astro Boy: Omega Factor game for the Nintendo Game Boy Advance released in 2004, along with many other characters also created by Osamu Tezuka.
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One of the services making up JR West's "Big X Network", it connects Kyoto Station, Amanohashidate Station and Toyooka Station via the Sanin Main Line and Kitakinki Tango Railway's Miyafuku Line and Miyazu Line.