Very strange spam

For the past couple of weeks I’ve been getting very strange spam with contents such as $B:#F|$O$J8$K$J$C$F$O$$$?$@ which is really weird. I just tried adding the first 20 or so characters of the email into the web front end to MT and it totally mucked up my keyboard, so I guess its some form of an ANSI keyboard remap or something? All I can think of its some sort of japanese spam (as a lot of the emails are .jp address’s)
Anyone else seen this?