The company does not survey the carrier's own shops, which are major players in the Japanese cellphone market. In addition, number three, the Panasonic 830P is an almost one year old phone (last year's winter model) since superceded by two newer Panasonic phones, and the Casio W63CA is similarly an ancient (in Japanese terms) model.
Thus, to anyone who knows about the Japanese mobile phone market (such as anyone who reads my blog) the survey results are obviously biased towards bulk retailers and the people who frequent them rather than to the average Taro who frequents the carrier's own store on the High Street.
BASIC is the Computer Science equivalent of `Scientific Creationism'.