| Sony Network Communications, Inc. | |
| Sony Payment Services Co., Ltd | Tokyo |
| Sony Startup Acceleration Program | Tokyo |
| Sophia Holdings Co., Ltd | Tokyo |
| Sophia University | |
| Soracom, Inc. | |
| Soracom, Inc. | |
| Soramitsu Co., Ltd | Tokyo |
| Sosei Group Corporation | Tokyo |
| Soulware Co., Ltd | Tokyo |
| SOUNDRAW, Inc. | |
| Sourcenext Corporation | Tokyo |
| Sozo Co., Ltd | Kyoto |
| Space BD, Inc. | |
| Space Walker Co., Ltd | Tokyo |
| SpaceData, Inc. | |
| Spacely Co., Ltd | Tokyo |
| Spandnix Co., Ltd | Saitama |
| SPARX Innovation for Future Co., Ltd | |
| SpeedFam Co., Ltd | Kanagawa |
| Spera Pharma, Inc. | |
| Sphere System Design Co., Ltd | Kanagawa |
| Spicemart Co., Ltd | Tokyo |
| Spicescode Co., Ltd | Tokyo |
| Spike Chunsoft Co., Ltd | Tokyo |
| SpinNet | Tokyo |
| SpiralMind Co., Ltd | Tokyo |
| Splume Corporation | |
| Sports AI Co., Ltd | Tokyo |
| SPP Technologies Co., Ltd | Tokyo |
| SPPD Rental Server | Tokyo |
| Spread Systems Co., Ltd | Tokyo |
| Sprocket Co., Ltd | Tokyo |
| Square Enix Co., Ltd | Tokyo |
| SRA OSS, Inc. | Tokyo |
| SRA Tohoku, Inc. | Tokyo |
| SRE AI Partners Corporation | Tokyo |
| SS-Network Co., Ltd | Osaka |
| SSS.SYSTEM Corporation | Tokyo |
| St. Andrew's University | |
| St. Luke's International University | |
| St. Marianna University School of Medicine | |
| St. Mary's College | |
| Stake Technologies | |
| Standex Electronics Japan Corporation | Tokyo |
| STAR Japan Co., Ltd | Tokyo |
| Starling Software Co., Ltd | Tokyo |
| Startbahn Co., Ltd | Tokyo |
| STARTECHNO Co., Ltd | |
| StartiaRaise Co., Ltd | Tokyo |