character corruption in Mail in macOS 10.13 with language mismatch

Thank you for your advice. I hope it is solved soon.

I sent a feedback as follows (basically same as this thread):

After updating to 10.12.4 from 10.12.3, (now 10.13) character corruption of some of the received and new coming emails occurred in Mail.app.

Details:

Use macOS Sierra or High Sierra with system language English, this issue appears.

If macOS's language is selected to Japanese, the issue disappear.

It seems language mismatch of macOS and mail cause the problem.

I uploaded the corrupted email in the following link:

http://www-cc.gakushuin.ac.jp/~20110166/tmp/characterCorruption.eml

The same topic is discussed in community (they are not solved):

https://discussions.apple.com/thread/8134388

https://discussions.apple.com/thread/7911070

Thank you.

I received readable email from you.

Only few (actually one) type (?) of email (mailing list) I'm receiving are corrupted all the time.

The mailing list is here: http://www.summitstore.co.jp/toppage_swf/otoku/index3.html

It is needed to have ID number for receiving email, so it is difficult to other to test...

I can read the mails from them in iPhone or Mail.app with Japanese language configuration in macOS.

But not in Mail.app with English language configuration in macOS.

It seems the problem is very specific.

Thanks for following up.

Here is what I can find:

Content-Type: text/plain; charset="Shift-JIS"

Content-Type: text/html; charset="Shift-JIS"

One additional information.

When I reply or forward the corrupted email, the quoted original message become readable.

The problem still exists.

Here I uploaded a mail with character corruption:

http://www-cc.gakushuin.ac.jp/~20110166/tmp/characterCorruption.eml

I hope the problem is solved.