Hello, With the following three bugs, all the default locale charsets except two (Vi_VN.IBM-1129 & ja_JP.IBM-eucJP) are fixed for AIX platform. - JDK-8201540: [AIX] Extend the set of supported charsets in java.base - JDK-8202329: Codepage mappings for IBM-943 and Big5 (aix) - http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-May/053050.html : [AIX] Add charset IBM-964 (default charset for zh_TW.IBM-eucTW) to stdcs [bug not yet opened]. For those fixed charsets, the charsets were existing in the extended charsets (jdk.charsets) and they were not working with default locale charset as it did not exist in the standard charset (java.base). The charsets correspond to the two pending locale (Vi_VN.IBM-1129 & ja_JP.IBM-eucJP) does not exist in the jdk. They need to be added to the extended charsets before adding to stdcs on AIX platform. Here, am including the patch to fix the charset IBM-1129 for the locale Vi_VN.IBM-1129. We are working on the other missing charset (for ja_JP.IBM-eucJP) which will be contributed in some time. The webrev of the fix is available at http://cr.openjdk.java.net/~aleonard/IBM1129/webrev.00/ Kindly request you to open a bug and review the fix. Please let me know if you have any questions. Thank you, Nasser Ebrahim