Currently based in Okinawa, professional bass player Yo Yasuda has played with a number of artists like Syakari, Siori, and Namiko. Although that should be enough to be of interest to our pop culture blog, he’s gone and done something to really excite us: introducing the BeatMaster app for iPhone and iPod touch. According to his blog entry, Yo created the app as a way to help musicians build a strong sense of rhythm in a fun, and very portable way. The video above showcases the app in a very familiar setting: Okinawa Churaumi Aquarium. Sounds interesting? Check out the product’s website or at the iTunes App Store (link opens iTunes).