It came to my attention that Kyoto, Japan-based image sensor start-up Rosnes come up with many products. The camera module products are in a pdf catalog in English, while image sensor chip list is in Japanese. Rosnes sensors appear to be based on 1.75um and 3um pixels with resolution range spanning from VGA to 5MP, some with integrated ISP - quite a lot of products for a less than 3 year old company! The company also offers custom design and IP services.
The company information page says that Rosnes was established in January 2007. Takumi Yamaguchi, Rosnes' President, reportedly came from Panasonic. The company investors are Daiwa SMBC Capital, Nissei Capital, and NTT Finance.