National Institute of Information and Communications Technology [Japan] https://ror.org/016bgq349
Yamaguchi Prefectural University [Japan] https://ror.org/04b7w1811
Waseda University [Japan] https://ror.org/00ntfnx83
Kindai University [Japan] https://ror.org/05kt9ap64
Kyushu University [Japan] https://ror.org/00p4k0j84
2021 Volume 16 Pages 5-18
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https://ror.org/016bgq349 
