Ark was a Japanese company that produced a series of die-cast metal monster toys sold under the brand name "Arklon."
It was founded as a sales and marketing subsidiary of famed Japanese toy manufacturer Bullmark.
The Arklon toys were imported to the United States by the Marukai Trading Company.
With one exception, King Kong (sold under the generic name "Mech-Gorilla" in the USA), all of the Arklon toys were based upon kaiju characters from the Ultraman television series.
The unique designs, which Ishizuki has described as "my attempt to create character toys that could be enjoyed even by those unfamiliar with the given film or television series," have made them favorites among Japanese toy collectors.