Due to the warm climate of Erabu, various insects appear throughout the year. Especially from May to July, the high humidity also causes mold to grow easily. This section introduces common insects and animals, and how to deal with them.
Common Insects and Animals on Okinoerabu Island
The appearance of insects varies by season, but they are especially active from May to August. Note that this is just a rough guide—some may appear outside this range.
Millipedes / Centipedes
- Season: May–July, October–December
- Countermeasures:
- Spraying insecticide around the house reduces their numbers.
- Use specialized insecticide products if they enter the house.
Cockroaches
- Season: Year-round
- Habitat: Where food is present
- Countermeasures:
- Keep your home clean at all times.
- Seal food tightly and dispose of kitchen waste frequently.
- Set traps such as boric acid balls or glue traps for effectiveness.
Winged Ants
- Season: May–July (especially at night)
- Countermeasures:
- Close windows and curtains at night and keep lights dim.
- Seal gaps in windows and screens during high season.
Stink Bugs
- Season: May–August (especially at night)
- Characteristic: Strong odor
- Countermeasures:
- Close windows and curtains and reduce indoor lighting at night.
- If one enters your home, avoid touching it—many leave by morning on their own.
Southern Green Stink Bugs
- Season: May–August (especially at night)
- Characteristic: Strong odor; rare cases of entering ears
- Countermeasures:
- Close windows and curtains, reduce light at night.
- If inside, don’t touch—most leave by morning.
Rats
- Season: Year-round
- Habitat: Places with food
- Countermeasures:
- Keep food clean and rooms well cleaned.
- Use rodenticides and traps for extermination.
How to Reduce Insects and Rodents
Local supermarkets on Erabu Island carry a wide variety of insecticides, rodenticides, and traps. Prepare the necessary items in advance, especially before the high season.

Mold Prevention
During the rainy season from May to July, heavy rain and humidity cause discomfort and make laundry hard to dry.
Prevention Methods
- Food Storage: Keep food in the refrigerator to prevent mold.
- Mold & Humidity Measures:
- Dehumidifiers or desiccants are effective.
- Ventilate frequently in areas where moisture tends to accumulate.