I don't know how you're getting o-macron in LJ, but.

I picked up the HTML for a handful of random diacritical markings when I was transliterating from Akkadian, and went with this particular system because I found the most attributions for it online.

So youkai is a long o, the spelling 'yokai' is wrong, and the macron is an older system.

Goodbye, macron.

Clear as mud?

Actually makes sense. Thanks.

*uses the only Saiyuki icon I have at the moment*

It's a very good one.