Japan announced the name of their new era, 令和 (reiwa), today. This announcement has set several things into motion, one of which is the publishing of the Adobe-Japan1-7 specification that adds CIDs 23058 and 23059 as the respective horizontal and vertical forms of the two-kanji square ligature form that will be encoded as U+32FF SQUARE ERA NAME REIWA in Unicode Version 12.1. Font developers can now reference the Adobe-Japan1-7 specification.
For those who were not aware, the Unicode CMap resources for Adobe-Japan1-7 were published last year in the open source CMap Resources project.
The animated images above show CIDs 23058 and 23059 in all six weights of Kozuka Mincho (updated to Adobe-Japan1-7), whose glyphs were designed by Adobe’s Chief Type Designer, Ryoko Nishizuka (西塚涼子). Ditto for Kozuka Gothic below: