Unlike for Adobe Framemaker MIF files to be translated into Japanese (or from Japanese),
the Studio DOCX filter does not have a mechanism for translators to specify the sort order of DOCX index entries, nor are existing sort-order tags extracted from Japanese DOCX files.
Documentation of the Apply index entry sort order tags for Adobe Framemaker MIF:
https://docs.rws.com/980998/643547/trados-studio-2022/displaying-sort-order-tags-correctly-in-adobe-framemaker
https://gateway.sdl.com/apex/communityknowledge?articleName=000002286
To avoid DOCX rework after "Generate target translations" (or complicated work-arounds), it would be good, if such a feature could be added to the DOCX filter in Studio.
In the RTF format, this index entry looks like this:
{\xe {\rtlch\fcs1 \af31507 \ltrch\fcs0 }{\rtlch\fcs1 \af31507 \ltrch\fcs0 \loch\af31506\hich\af31506\dbch\f11 \uc2\u-26885\'93\'64\u-30095\'98\'62\u30058\'94\'d4\u21495\'8d\'86}{\rtlch\fcs1 \af31507 \ltrch\fcs0 \yxe }{\rtlch\fcs1 \af31507 \ltrch\fcs0 \loch\af31506\hich\af31506\dbch\f11 \uc2\u12391\'82\'c5\u12435\'82\'f1\u12431\'82\'ed\u12400\'82\'ce\u12435\'82\'f1\u12372\'82\'b2\u12358\'82\'a4}{\rtlch\fcs1 \af31507 \ltrch\fcs0 }}