Nintendo is holding some sort of event today in Japan, far from our watchful eye. Though it may be able to hide from the Joystiq Biomass, it can't hide from the internet, as the folks at NeoGAF have once again proven. User Jonnyram got some tidbits from the Japanese Rambling Man blog, which (according to his translation) says you can expect to see Wii Music in the Land of the Rising Sun on Oct. 16. If the post can be believed, you can also look for Captain Rainbow in August, colored Wiimote straps in September and Valkyrie Profile DS on Oct. 2. We're a couple of language barriers removed from the source, so we wouldn't write it in stone, but the info does seem to represent our best guess at a Wii Music window for the moment.