If it does, I'd like to get that dumped and the cartridge emulated with the font ROM included, of course 
As the PHC-77 has inside a Kanji ROM level 1, I guess that MSX-WRITE 1st version does not have a Kanji part.
http://usbsecretbase.michikusa.jp/wavy77/index.html
So, it means that KANJIROM.BAS must be used !
(and that the cartridge MSX-WRITE 1 can be used only on machines with an internal or external Kanji ROM)
Well, I wouldn't draw that conclusion. For all we know, the PHC-77 has the kanji ROM built in *because* of MSX Write being built in.
And as the kanji ROM for MSX Write is just a standard implementation (e.g. it works fine with Konami EC-702) it could also be that they found it a good combination: the MSX Write software and a kanji font ROM.
Anyway, this doesn't say anything about the actual separate MSX Write cartridge, I think. So it's still very well possible that it's included. Also note that according to Tagoo, this cart is 5Megabit. This could be the 512kB program/data ROM plus 128k of font ROM... who knows?
So if someone has the cart, please speak up
That's possible ... it should then mean that the existing dumps of these cartridges are uncomplete. At first sight, when checking with an hexadecimal editor, the Kanji fonts are missing. Very interesting ! 
(Something like the bundle MSX-DOS2 + extra RAM in the 'real' MSX-DOS2 cartridge)
I have 1 in my collection for now. A Sakhr AX 660. I like retro gaming and the MSX is very nostalgic for me.
I plan on adding more computers to my collection in the future but I am not your average collector. I don't collect anything. Only the very rare and unique items.
I'm looking for the Sakhr AX 330, 990, and 500 now. It could take years to find them all. But that's the fun part isn't it
