Instruct: Classify Amazon reviews into positive or negative sentiment
Query: just a piece of unhuman joke

The source of the materials is from Japanese army. If you have compared the history records of the World War II by the Japanese army itself to those by any other books from the third country, you should immediately notice the difference - in short, Japanese army's own records are just pieces of joke. The Japanese army even is trying to deny its defeat in the World War II. Can you still expect any credibility from this book? In conclusion, one of the worst books written by shameless Japanese.