IJCAD supports SHX file, particular to DWG.
After IJCAD 2014, IJCAD supports bigfont (extfont2.shx or extslim.shx, etc.) for japanese, which is well used in japanese market, so we trust to provide the good environment without any japanese garbled characters.
IJCAD also supports the adjustment for SHX font character width and it can control even the small character slippage.
Sample compared with AutoCAD font
IJCAD also provides a good environment of multi language drawings, compared with AutoCAD.
If you have any garbled characters problem trying by DEMO version, please let us know.