Is it correct to split the reading あした of 明日 as 明（あ）日（した）?


As far as I understand 明日（あした） is jukujikun (also called semantic ateji), so,
as with for example 今日, I would expect for the "reading" to be considered over
the whole word, instead of being split into the individual kanji readings as
is done with normal words.

But in a lot of places (dictionaries, etc) I see the reading of 明日 split into
明（あ）日（した）.

I can see where that might come from, since あ is a normal Kun-reading for 明,
but the again した is no valid reading for 日.




There’s no really “correct” or “incorrect” when it comes to ateji like 明日{あした}
or 大人{おとな}, you just have to pick _something_ or _least bad_.

With _jukujikun_ (kanji picked purely for meaning and not readings) it’s even
worse since you may have not enough kana for the kanji. Some examples [from
Wikipedia](https://en.m.wikipedia.org/wiki/Kanji#jukujikun):

> kera (啄木鳥, woodpecker), gumi (胡頽子, silver berry/oleaster), and Hozumi (八月朔日,
> a surname)

I think the best choice in such cases is simply center the reading above the
whole word and do not align kana to individual kanji.

