[DTogo]

More likely militant Leftists in Japan, or some otaku (loner/nerd) with a fetish more things military (like rockets/explosives, etc).

Japan * ping * (kono risuto ni hairitai ka detai wo shirasete kudasai : let me know if you want on or off this list)

[Ronin]

I agree. Probably Chukakuha or some other leftist-geezer 60s leftover group.