On Halloween, residents of Ojika Island came together to celebrate at a local grocery store completely decked out in a variety of expertly prepared costumes! As I explored, I spotted various cats, a 狐 ("kitsune" fox), a pirate, some ghosts, and a few superheroes such as Iron-Man and Spider-Man!
The adults in the crowd also had impressive outfits, including princesses, and a retro school-girl. The cashier in the grocery store even participated - he wore a SWAT uniform that was very realistic and a little bit terrifying.
While "trick or treating" is a famous holiday tradition in the USA, it isn't a widespread phenomenon in Japan. In fact, Halloween only truly arrived in Japan around twenty years ago when Disneyland held it's first Halloween event.
Since it's more of a niche activity, you won't be able to go "trick or treating" at random houses in Japan. Instead, on Ojika Island, children pick up a map from a friendly witch in a booth that gives them the locations of the homes they can visit for some sweet treats. Japan has adopted the holiday and applied it's own Japanese twist to the festivities.