Japan is hard on bicycles

Just like umbrellas. The interesting thing here is an abandoned
bicycle, unlocked, would disappear rather quickly at home. This poor
thing has been here for several days.

My understanding of Japanese bicycle migration suggests it was
probably left unlocked and was stolen for a drunk ride back to the
neighborhood. Moral of the story: even the most minimal lock that
prevents the bike from rolling will go a long way towards preventing
theft.

As a side note, those stairs go down into the underpass where those
kid's paintings are located.