Shirow frequently attributes the Seburo name to advanced, high-velocity, small-caliber weapons, similar in concept to firearms using 5.7x28mm SS190 and 4.6x30mm cartridges [REF].
Going by the timelines of respective Shirow works, Seburo is noted or mentioned in Ghost in the Shell (set around the decade of 2030), Dominion (also set around the decade of 2020),[REF] and Appleseed (between 1988-2147) [REF].