It's not that nobody wants it or that sony didn't know how. I think they just didn't want to compete with themselves.
They also make electronic dictionaries.
http://www.sony.jp/products/Consumer/DD/index.html
http://translate.google.com/translat...k%2Findex.html
http://www.sony.jp/products/Consumer...8MS/index.html
http://translate.google.ca/translate...n&hl=&ie=UTF-8
During the day included the Sino-Japanese dictionary to help you learn Chinese.
Chunichi DictionaryDictionary Day
Extensive commentary and detailed wording included in the examples and everyday conversation.You can search by typing Pinyin Romanized pronunciation is examined. In addition, it is difficult not to use similar-sounding word, you can search by pressing the button tonal intonation, also helps the conversation.