Am 09.09.2010 um 10:21 schrieb S Barmeier:

Dear ConTeXt users,

I am trying to write a document (grammar notes) in English and Japanese
and so far have used XeTeX (for Unicode support) with tikZ (for
graphics) quite successfully. However, I wish to convert to (Xe)ConTeXt
in order to have more control over the page design.

At the moment I am stuck at trying to define English and Japanese fonts.
In XeTeX I used

\usepackage[BoldFont]{xeCJK}
\setCJKmainfont{IPAMincho}
\setCJKsansfont{IPAGothic}
\setCJKmonofont{KanjiStrokeOrders}

in order to set the three different Japanese fonts I am using.

I haven't found any documentation on how to implement something
equivalent in ConTeXt and would be most grateful if someone could
outline how I would best go about converting my XeTeX document to ConTeXt.

With MkIV you can set different fonts for Japanese with the fontfallback
mechanism, there is not documentation about it but you can on the net
a few examples how to use it:

http://liyanrui.is-programmer.com/2009/10/21/not-just-for-chinese.12264.html
http://liyanrui.is-programmer.com/posts/5737.html
http://blogs.gnome.org/happyaron/2009/11/02/font-fallback-in-context-mininals/

The simplefonts modules provides a fontspec inspired interface to use
the mechanism in a simpler way:

\usemodule[simplefonts]

\setcjkmainfont[IPAMincho]
\setcjksansfont[IPAGothic]
\setcjkmonofont[KanjiStrokeOrders]

\starttext
...
\stoptext

Wolfgang