Refer to the following.
If garbage accumulates in the drainage basket, it will become clogged and the drainage capacity will be reduced. First of all, please check that there is no trash in the drainage basket.
（If the basket is clogged, please try clean it with a brush.）
Also, if the rubber sink strainer (attached document) is installed at the drain outlet, water will easily accumulate in the sink, so please check whether the water flows when removed.
Customers who have subscribed to the "Resident General Service & Key Anshin System" or "Resident Support System" can use the express service for water related troubles and drainage clogging free of charge.
※Customer's intentional or negligent damage repairs may be charged at actual cost.