Re:Abe explains choice of Reiwa for next era name
by Gaelan on Sunday March 31, 2019 @11:38PM
(#19540269)
http://blog.unicode.org/2018/09/new-japanese-era.html was posted here yesterday, but the short answer is that the era can be referred to using two existing characters (for the current era: 平成) or with one new combined one (㍻). Wiki is using the former, so it doesn't need software support.
They create a brand new character for the era names? I find that a little hard to believe, because Wikipedia [1] already has the Reiwa era listed and my computer has a font that can display the kanji for it.
[1] https://en.wikipedia.org/wiki/List_of_Japanese_era_names