Combining macron on Mac

[Katsuhiko Momoi]

How do users input or get a Latin letter (usually a vowel) with a macron 
(-) over it on Macintosh, e.g. to represent a long vowel in Japanese. I 
have not been able to find any dead key combination for this on Mac OS 
8.6. Maybe there is an improvement on this for Mac OS 9?

If this is not possible by conventional means, what are alternatives?

- Kat

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Katsuhiko Momoi
Netscape International Client Products Group
[EMAIL PROTECTED]