Mahoroba Kobo, Inc.

Prodelight

Brastel Co., Ltd.

Leafnet Co., Ltd.

SANNTUU TELECOM Corp.

GRANTON Co., Ltd.

KRONOS Co., Ltd.

Link Inc.

Microsoft Japan Co., Ltd.

Softsu Co., Ltd.

Ayucom Co., Ltd.

RingCentral Japan Co., Ltd.

Mitsuiwa K.K.

​Twilio Japan G.K.

Ascend Corporation

Dialpad Japan K.K.

ADJUST ONE

BRISYS Inc.

ZVC Japan KK (zoom)

JMS-United Co.,Ltd.

Intermedia Technologies Japan G.K.

KDDI Web Communications Inc.

NEXWAY CO., Ltd.

SoftBank Corp.

Bewith, Inc.