Heres a full list of Japanese ID@Xbox developers with dev kits.
Aabs http://www.aabs.co.jp/
Black Tower Studios http://blacktower.jp/
Booby Trap http://booby-trap.jp/top.html
Cloud Creative Studios http://cloud-creative-studios.com/
Comcept http://comcept.co.jp/en/
CRI Middleware http://www.cri-mw.com/
Hexadrive http://hexadrive.jp/english.php
iNiS https://www.inis.jp/en/
Inti Creates http://www.inti.co.jp/
Land Ho! http://www.landho.co.jp/en/index.html
Link Kit http://www.linkkit.co.jp/en/
Monobit http://www.monobit.co.jp/
NanaOn-Sha http://www.nanaon-sha.com/eng.html
Nigoro/Asterizm http://nigoro.jp/en/
Nude Maker http://www.nudemaker.jp/en/index.html
One or Eight http://one-or-eight.co.jp/
Opus http://www.opus.co.jp/index2.html
Pocket Queries http://www.pocket-queries.co.jp/
Railfan Holdings http://railfan.co.jp/top/index.html
SmileBoom http://smileboom.com/en/index.php
Aabs http://www.aabs.co.jp/
Black Tower Studios http://blacktower.jp/
Booby Trap http://booby-trap.jp/top.html
Cloud Creative Studios http://cloud-creative-studios.com/
Comcept http://comcept.co.jp/en/
CRI Middleware http://www.cri-mw.com/
Hexadrive http://hexadrive.jp/english.php
iNiS https://www.inis.jp/en/
Inti Creates http://www.inti.co.jp/
Land Ho! http://www.landho.co.jp/en/index.html
Link Kit http://www.linkkit.co.jp/en/
Monobit http://www.monobit.co.jp/
NanaOn-Sha http://www.nanaon-sha.com/eng.html
Nigoro/Asterizm http://nigoro.jp/en/
Nude Maker http://www.nudemaker.jp/en/index.html
One or Eight http://one-or-eight.co.jp/
Opus http://www.opus.co.jp/index2.html
Pocket Queries http://www.pocket-queries.co.jp/
Railfan Holdings http://railfan.co.jp/top/index.html
SmileBoom http://smileboom.com/en/index.php
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