It sold at Japan.
Price is 880yen.

http://natalie.mu/comic/gallery/show/news_id/66251/image_id/118000

Dear Alex:

Do you think that soldiers who use house of comfort woman are doing atrocities?

To Chris,

I think you are loving Ninja Stories.
And you know, Ninja Stories are fiction.
If you check wikipedia "Katana" entry, you know that test you are mentioned is only in novels.

To others:

Iris Chang's book contains many photoshoped content.
If you want to believe her assertion, you should check below book.
"The Politics of Nanjing: An Impartial Investigation" by Kitamura Minoru.
This book say author are trying to validate her assertion, but they can't find any evidence that proving her assertion.

About Nanking issue, some Japanese politician made a proposal to investigate that issue is with Japan, China and third party county, for example United States are good for distinguishing what is fact.
But China is reject this proposal.

What kind of thing the China communist hide?

It's just only propaganda by china communist.
Because it is impossible to kill 100 people with one sword.

Do you believe communist?

In Japan, pig and swine are different animals.
That T-Shirt drawing indicate a swine.