In mixi, Inc.’s press release (September 29, 2015), TOSE was mentioned as its partner that provides support for developing "Monster Strike" for the Nintendo 3DS.

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Click here to view mixi, Inc.'s press release (in Japanese).

*Please note that Tose cannot respond to any questions or inquiries regarding this matter.

"mixi," the mixi logo, and "Monster Strike" are registered trademarks of mixi, Inc.
"Nintendo 3DS" is a registered trademark of Nintendo Co., Ltd.