The check tool is no use at all!!!

[shendan19880401]

I used the check tool to check the file sync folder.
the csv file has 1 million more records, and even lots of them are supported chars, there is check error as below:
the Japanese [４]，ASCII code is 65300 which is supposed to be supported, but it is checked out.

It really a heavy job to review every record as there are 1 million more records!
please tell me how can I use less time to find the file or folder that really include unsupported chars.