Kyoto Stage
When you're at the final stage, Karasuma Keep, you must knock the Odama through the main gates. This will take you to a secret stage which looks like modern-day Kyoto! And of course, there's the Nintendo of Japan Headquarters. A Heavenly Odama will come down so that you can knock around Nintendo employees and use them in the final battle. To exit, let the Odama roll into the gutter.

Free Play Mode
Finish the game.

Unlockable: Kyoto Stage
When you're at the final stage, Karasuma Keep, you must knock the Odama through
the main gates. This will take you to a secret stage which looks like modern-day
Kyoto! And of course, there's the Nintendo of Japan Headquarters. A Heavenly
Odama will come down so that you can knock around Nintendo employees and use
them in the final battle. To exit, let the Odama roll into the gutter.

Unlockable Free Play Mode
Finish the game.