BUG #5134: initdb fails with return code 1

The following bug has been logged online:

Bug reference: 5134
Logged by: Savita
Email address: savita(dot)halli(at)gmail(dot)com
PostgreSQL version: 8.3.5
Operating system: AIX HP
Description: initdb fails with return code 1
Details:

Hi

We have written the script to create the postgres database. Now the initdb
fails with return code 1.

The locale of the system is Ja_JP (AIX). I am getting the similar error in
HP of locale ja_JP.SJIS.

With error I could make out that initdb is unable to determine the encoding
for these locale.

I am pasting the error I am getting

The files belonging to this database system will be owned by user
"postgres".
This user must also own the server process.

The database cluster will be initialized with locale Ja_JP.
could not determine encoding for locale "Ja_JP": codeset is "IBM-943"
initdb: could not find suitable encoding for locale Ja_JP
Rerun initdb with the -E option.
Try "initdb --help" for more information.
1
Execute initdb failed!. Exiting installation .......

Could you please let me know how I can resolve this?

Thanks in advance
Savita