Gentlemen,
reading all these comments on fakes, I want to add my view on it.
About thirty-five years ago, there was an auction of Japanese art at Lempertz in Köln, Germany. One of the blades on display was a gorgeous KATANA with HITATSURA HAMON and a very long O-GISSAKI. It looked very nice, but an advanced collector I met there told me it was GIMEI and not KIYOMARO as the signature implied. Nevertheless it looked very desirable to my untrained eyes.
Later I learned that this sword was bought by a professional dealer from Japan. I could not understand this, because I thought he should have known it was GIMEI. The collector explained to me that the dealer knew exactly what he was buying (at a price of something around DM 8.000.--; quite a lot then), and he explained about the mentality of private Japanese buyers. He said this sword would very probably be sold at a much higher price to a private collector without mentioning the GIMEI - and without being asked about it either! If the sword was about the quarter of the price of a genuine KIYOMARO (or even less), the new owner would know what it was, be happy with it, keep it in his TANSU, perhaps even not telling his closest friends about the purchase, and never show it to someone to avoid being called a boaster.
The German collector said, the price difference made the fake obvious, so nobody felt a necessity to talk about it. It would not have been polite to mention it.
Later I learned also that O-MINOGAME, the 1.000-year-turtle, is not exactly 1.000 years old - it is just old. This and some others stories taught me that terms like 'genuity', age, 'truth' and 'original' can have different meanings in different cultures.
To sum this up I suspect the Chinese fakers do not at all feel bad about their business. They might even not feel guilty when they are caught selling pirated products. To an extent this could be a question of Asian mentality.