Before I even fly to Japan, I heard that there might be mould issues in my apartment. I have never experienced such issues, so I am very concerned. Research has advised me on the following,
- カビキラー is my friend.
- But make sure the house if ventilated very well when it is used.
- Set the AC on its dehumidifier (除湿) mode.
- Get a dehumidifier (除湿機).
- Run it on 24/7 first.
- Then run them before/after storms or other high humidity periods.
- Put it in the room furthest away from the aircon, and then rotate it around to the other rooms.
- Buy a lot of those 除湿剤 from Daiso and stuff it around the house.
- Buy a few thermometers which measure humidity and keep an eye on them.
- House should be below 50% in humidity level.
- Make sure there aren’t any water leaks.
- Futons, beddings and clothing should be hung to dry between 10 am to 3 pm if possible, as humidity levels are low during that time period.
- A couple of cm of a gap between the wall and pieces of furniture should be observed, so that air can pass through them and no mould will form.
Bonus tips to be found at http://ajet.net/resources/daily-jet-life/cooling-in-japan/
外国女子が日本で国際交流員になって感じたことがヤバい件 
That would worry me, too!
Take the advice about your bedding very seriously. Allergens where you sleep are in close contact with your airway for ~1/3 of your day.
Mold likes damp, dark, and still conditions. Fight it with air movement, sunlight, and that dehumidifier.
Be healthy! 🙂
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→ Allergens where you sleep are in close contact with your airway for ~1/3 of your day ←
Oh.my.gosh. Yes, now that you mentioned it, that is so scary ><
I'm still not sure if I'll be getting a bed, or a futon.. but either way I'll definitely be careful of my bedding! Thank you for the reminder! 🙂
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