If your kitchen sink drains slowly or you notice an unpleasant smell from the drain, here are some simple steps you can try before contacting the management company.
Why Japanese Drains Behave Differently Than Overseas
Many overseas homes—especially in the U.S.—use larger drainage pipes and stronger chemical cleaners.
In Japan, pipes are often narrower, and some heavy-duty foreign cleaners can be too strong, sometimes causing damage or reacting too aggressively.
For this reason, it’s safer to use cleaners that are designed for Japanese homes.
What You Can Try First
Check the Sink Area
Remove the strainer and clear out any food scraps or visible buildup.
Run water to see if the drain is slow or if the smell becomes stronger.
Use a Pipe Cleaner (Safe for Japanese Drains)
Pour the cleaner into the drain following the instructions.
Wait the recommended time, then flush with warm water.
If the smell or clog is still there, you can repeat the process.
Optional: Light Manual Cleaning
If you feel comfortable, clean the removable parts at the top of the drain.
A simple drain-snake tool (available at local home-centers) can help remove hair or buildup in shallow areas.
Prevention Tips
Avoid pouring oil or large food scraps down the sink.
Use a strainer and clean it regularly.
- Monthly light cleaning helps prevent future blockages.
Pipe Cleaners You Can Buy in Iwakuni
These products are commonly available at home-centers such as Juntendo, Nafco or Komeri:
Pipe Unish PRO (パイプユニッシュPRO)
A widely used household cleaner that works well for everyday clogs and odors.PP Sulu F (ピー・ピー・スルーF)
A stronger option for tougher buildup. Use according to instructions.Rinrei Ultra Hard Pipe Cleaner (リンレイ ウルトラハード パイプ用)
Effective for persistent smells or heavy residue.Nihon Gousei Detergent Gel Pipe Cleaner (密着ジェル パイプクリーナー)
Gel type that sticks to the inside of the pipe—good for regular maintenance.SANEI Pipe Cleaner (SANEI パイプクリーナー)
Easy to use and suitable for kitchen and bathroom drains.
When to Contact the Management Company
If you have tried these steps two or three times and the clog or smell does not improve, please contact your management company.
The issue may be deeper in the building’s drainage system and requires professional inspection.