Solution : https://service.sap.com/sap/support/notes/546905 (SAP Service marketplace login required)
Key words : 
applet incorrectly displays japanese, terms double byte, 1b support package 4, sap service marketplace, sap j2ee engine, bsc reason, utf-16 coded, import sem 3, download mc, install mc
Related Notes : 
       
| 544979 | Importing Java Support Packages with SDM | 
| 534185 | |
| 330793 | Downloading patches |