A patch to enhance the game in various ways can be found here:
by rderooy | 3 years ago
Info on how to play the game (in Japanese): http://www.geocities.jp/galfned/usas/usas.htm
by rderooy | 5 years ago
Note: If you start this game on a MSX machine (or emulator) with KANJI ROM, all the text during the game will be in Japanese. This tends to be the case especially if your using an MSX2+ or TurboR since those machines where only ever released in Japan and as such have a KANJI ROM. As such if you want to have English dialogue, use a MSX2 without KANJI ROM (e.g. Philips NMS8250).