Did you just stumble upon a file that is digitally signed by Baidu Japan Inc.? If so, please read on.
You will probably notice Baidu Japan Inc. when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the Baidu Japan Inc. certificate with the following procedure:
Here is a screengrab of a file digitally signed by Baidu Japan Inc.:

As you can see in the screengrab above, the Windows OS reports that "This digital signature is OK". This implies that the file has been published by Baidu Japan Inc. and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can view all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also see the address for Baidu Japan Inc., such as the street name, city and country.
GlobalSign CodeSigning CA - SHA256 - G2 has issued the Baidu Japan Inc. certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Baidu Japan Inc. files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/56 | 1437707677.exe |
The detection percentage is based on the fact that I have gathered 56 scan reports for the Baidu Japan Inc. files. 0 of these scan results came up with some sort of detection. You can view the full details of the scan results by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: