Current version of Zend_Db_Adapter_Sqlsrv doesn't support to query unicode characters (i.e Japanese) in the database without prepared statements. As upddate(), delete() and fetchAll() methods don't support "real" prepared statements (str_replaces are done in the methods) it's not possible to support unicode characters.

The problem lies in the _quote method of Zend_Db_Adapter_Sqlsrv, as it doesn't quote to a unicode string. Microsoft SQL Server requires an prepended N to recognize unicode strings. So a query with japanese characters has to look like this: SELECT * FROM myTable WHERE myColumn = N'[japanese characters]';

So _quote method should also prepend the N for unicode characters. For this also the Zend_Db_Statement _stripQuoted method has to be adjusted as this only works with a single quoting character, which also has to be the same at start and end.