Serial # Y2B0522

I've got no idea what year this bike is. The paint is a deep blue with a nifty headbadge (looks like an angry samurai!) with "made in Japan" and "Special Tubing" decals. I'm not entirely sure what is original to the bike, but when it bought it it was equipped with ALPS handlebars, steel Araya rims w/ Miyata 27 x 1/2 inch tires, shimano stem shifters, a shimano (skylark?) rear derailleur along with a nondescript shimano front derailleur, takagi crank arms, and a shimano 5 speed freewheel (I think with twisty teeth). It has center pull brakes, but I can't tell the make. The frame has no braze-ons, but does have eyelets for fenders. That's all I got!