If the logo is different, it may support multi-language. Just remove the pointless locale files forcing it to change and see if it defaults to Japanese. Most recent releases are multi-language, so LM1 may be one too.
It seems that without the locale, the USA version wouldn't start. Also I tried to set the region USA and language JP and... I could play it but the language is still English. Guess I just have to find the Japanese cia.
