The official site doesn't seem to selling the game in cartridge form... and asking Google for キラキラスターナイト カートリッジ (Kira Kira Star Night Cartridge) tells you that some Japanese people made their own homebrew cartridge after the game came out.
Looking at the release party pictures on the site, I see that at least one official cart is made to show the game running on real Famicom, but the cart used in the picture looks different from the cart on the auction. It uses black cart shell rather than green one shown above.
So I guess the green cart above is a fan-made one, made in Japan rather than Taiwan/China. The cart label looks quite well-made and actually credits the original author RIKI, and I doubt that a random pirate outfit from Taiwan/China would do such a thing.
http://bakutendo.blog87.fc2.com/blog-entry-271.htmlEdit: I suppose this is the origin of the cart above.