It appears that the best model available on Zojirushi's JP site is the NP-WT10-BZ. $934 shipped on Amazon:

http://www.amazon.com/ZOJIRUSHI-Nanbu-Kiwame-Hagama-NP-WT10-BZ/dp/B00L7CBN5G

Ratuken's global site has it for a more reasonable (hah) $758, plus shipping: (although it looks like shipping would be approximately $110, so possibly as high as $868 shipped)

http://global.rakuten.com/en/store/nakaden/item/10010135/

At those prices, I'm curious if a commercial model would be a more viable solution, although I don't know if you could get as artisanal of results as you could with a Pressure IH iron-bowl model. And even with a foreign commercial model, I'd still need a converter. A recommended Nissho 120V to 100V 1500W converter runs $190 on Amazon:

http://www.amazon.com/Nissho-Converter-100v1500w-Ndf-1500u-Henatsuki/

So probably the lowest that combo would go for would be $1058.