Solution : https://service.sap.com/sap/support/notes/303637 (SAP Service marketplace login required)
Key words : 
terms customer relationship management crm r3setup japanese japan reason, start importing asian language data, 0b ondouble byte environment, 0b asia               24/feb/2004 caution, importing asia language, asian language  installations, 0b language cd, symptom problems occured, installation sap crm 2, functional restrictions apply
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| 42305 | RSCPINST (I18N configuration tool) |