[jesselt]

You should always be cautious whenever someone tells you that a certain method will help you learn "fast" because learning a language is never fast.

The program that he linked at the bottom is crap IMO. There is no way that you can learn 100 words an hour unless you have an extremely lose definition of the word "learn".
The program even promises "The amazing thing about this course is that once you have learnt the word, you never forget it." which is clearly faulty thinking. Also, the authors cannot even use proper English (you learned words, not learnt) so I wouldn't trust them to teach you Japanese.