Many thanks to KH for his fantastic book and to S.R. Ward Web Developmen for the Japanese language version.
I have installed successfully the multilingual (Japanese-English) Zen cart the server in TX as follows;
1) Upload and install the full English version to the server
2) Set MySql DB Collation to UTF-8
3) Change the followings:
includes/languages/english.php
a) ->Line 22 : @setlocale(LC_TIME, 'en_US.ISO_8859-1'); Change to ->: @setlocale(LC_TIME, 'en_US.utf8');
b) ->Line 49 : define('CHARSET', 'iso-8859-1'); Change to ->: define('CHARSET', 'utf-8')

4) admin/includes/languages/english.php
a) line 20 : setlocale(LC_TIME, 'en_US.ISO_8859-1'); Change to : setlocale(LC_TIME, 'en_US.utf8');
b) line 63 : define('CHARSET', 'iso-8859-1'); Change to: define('CHARSET', 'utf-8');

However, the query_factory.php., was left unchanged the key change suggested by S.R. Ward Web Development ( //BOF changed for utf-8 mysql_query('SET NAMES "utf8"', $this->link); //EOF changed for utf-8) was not added.

Except for the Configuration sub-menu in the admin area, which is English, all the other menus can be displayed in English or Japanese. This is exactly the opposite of what is happening on the local server in Osaka.
Alfred