Highlights. Filtered seawater is used, and only clean wakame is dried. After rotating the wakame in a large sieve for a long time to sift out foreign objects such as sand, it is then placed in the washing tank. Light contaminants that float and heavy contaminants that sink are removed. The wakame is also washed in running water before and after the cutting process where it is cut into the proper size. Foreign matter that is heavier than the wakame is removed. The wakame is repeatedly washed three or four times and loosened before the salt adjustment and drying process.
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