SBom Joycard
From Sega Retro
The SBom Joycard (エスボン ジョイカード) is a controller for the Sega Saturn manufactured by Hudson Soft. It was built mainly with Saturn Bomberman in mind, and was often distributed with the game along with the SBom Multitap in Japan, where it remained exclusive.
The SBom Joycard functions exactly like an ordinary Saturn controller, however has seven turbo buttons and a moulding of Bomberman on its shell. The turbo function claims to be able to output 26 "shots" per second.