The game's intro and "I am Impact" were both composed by Dragon Ball Z vocalist Hironobu Kageyama and Mazinger Z vocalist Ichirou Mizuki.
http://www.hardcoregaming101.net/goemon/goemon4.htm
The manji blocks were changed to star blocks in the US Version due to the similarity to the Nazi Swastika.
Japanese Version
US Version
The Wise Old Man's obsession to porn magazines was changed to car magazines in the US Version, possibly to make the game more family-friendly.
Car magazines:
Adult magazines:
it can be assumed that Ebisumaru's name came from the game's director, Etsunobu Ebisu
http://www.hardcoregaming101.net/goemon/goemon4.htm
The manji blocks were changed to star blocks in the US Version due to the similarity to the Nazi Swastika.
Japanese Version
US Version
The Wise Old Man's obsession to porn magazines was changed to car magazines in the US Version, possibly to make the game more family-friendly.
Car magazines:
Adult magazines:
it can be assumed that Ebisumaru's name came from the game's director, Etsunobu Ebisu