iconv to convert from Japanese to UTF-8

[Muskaan]

Hi,

We recently migrated from Sun to AIX. On sun we used to convert a feed from Japanese characters to UTF-8 before loading the data into our databases. For this, the command was:
conv -f SJIS -t UTF-8 $datafile > "$datafile".utf8
Now, as SJIS converter is not available on AIX, I am trying to use JISX0201.1976-0 in a similar manner:
iconv -f JISX0201.1976-0 -t UTF-8 ZY200881 > "$datafile".utf8

but still get the error: iconv: 0791-006 invalid chararacter found
Can someone help??
Thanks in advance!!