Remember Maywa Denki's Otamatone? The truly unique "tadpole" (or eighth note-shaped) electronic synthesizer was a bestseller around the world a few years ago and just got an awesome reboot thanks to the Kumamotone Kumamon Mascot Otamatone Musical Instrument. This new version is themed around the wildly popular Kumamoto Prefecture official mascot, Kumamon. Like with all Otamatone, you play the instrument by opening and closing the "mouth" and moving your finger along the neck. You can also adjust the octave and volume.
The Kumamotone Kumamon Mascot Otamatone Musical Instrument features: