SUMMARY Japanese glyphs have unreliable cell widths, causing entire lines to shift left/right with certain glyphs. This was noticed while playing around with the unimatrix script: https://github.com/will8211/unimatrix STEPS TO REPRODUCE 1. Get unimatrix script: https://github.com/will8211/unimatrix 2. Run it with 'unimatrix -s 80 -l k' or 'unimatrix -s 80 -l m' (higher number will have faster scrolling). 3. Watch as the glyphs scroll past, it will be noticeable that when including Japanese glyphs the lines will shift left/right as the fall past. Comparison with other terminal emulators makes this much easier to notice. OBSERVED RESULT Shifting left/right of lines with certain Japanese font glyphs. EXPECTED RESULT Consistent spacing and width of lines that contain Japanese font glyphs. SOFTWARE/OS VERSIONS Operating System: Gentoo Linux KDE Plasma Version: 5.19.5 KDE Frameworks Version: 5.74.0 Qt Version: 5.15.1 Kernel Version: 5.8.13-gentoo OS Type: 64-bit Processors: 8 × AMD Ryzen 7 PRO 3700U w/ Radeon Vega Mobile Gfx Memory: 13.6 GiB of RAM Graphics Processor: AMD RAVEN