Hello nobuhiko,
BMA422 software was not official released on web site and github. If you would like to design a project with BMA422 and request software, you can contact our official distributor(https://www.bosch-sensortec.com/about-us/contact/our-distributors-and-sales-representatives) according your location as the software couldn’t be provided on line, sign software license agreement and get the software.
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