[Sangetsu]

Teaching probably isn't an option, as you are generally required to be a "native speaker". As for accounting or finance, there are fewer and fewer of these positions available even for experienced Japanese; much of this work has been outsourced to India, and banks are laying off workers to cut costs.

You will not make enough income to qualify for a work visa in the service industry (tending bar, waiting tables, or flipping burgers). Your only real option is to wait for the economy to get better, and perhaps study Japanese while you wait.