Vs. Mighty Bomb Jack (Japan) dip switch settings:
*** http://www.johnsarcade.com ***

Dip bank #1:

COINAGE: (dips 1-3)
 - 5 Coins/1 Credit        ON ON ON
 - 4 Coins/1 Credit        ON ON  OFF
 - 3 Coins/1 Credit        ON  OFF ON
 - 2 Coins/1 Credit        ON  OFF  OFF
 - 1 Coin/1 Credit*         OFF  OFF  OFF
 - 1 Coin/2 Credits         OFF  OFF ON
 - 1 Coin/3 Credits         OFF ON  OFF
 - 1 Coin/4 Credits         OFF ON ON
LIVES: (dips 4-5)
 - 2                                    OFF ON
 - 3*                                   OFF  OFF
 - 4                                   ON  OFF
 - 5                                   ON ON
UNKNOWN: (dip 6)
 - Off*                                         OFF
 - On                                          ON
UNKNOWN: (dip 7)
 - Off*                                             OFF
 - On                                              ON
UNKNOWN: (dip 8)
 - Off*                                                 OFF
 - On                                                  ON

* - default setting