There are several possibilities to display a map on keitai.
With a well formatted address, you can display a map directly with a link like
The address (utf8) has to be url-encoded, though, to work on keitais.
Yahoo keitai maps provides a search interface which always presents an intermediary page. Also, the address has to be url-encoded from shift_jis characters
The only way to link to a map is by using latitude and longitude in decimal formats like
Navitime provides an ASP service with a finder from an address list as well as route info.
To link to a specific place, the keitai link seems to be like